M88 FAMILY
In-System Programmable (ISP) Multiple-Memory and
Logic FLASH+PSD Systems (with CPLD) for MCUs
DATA BRIEFING
s
s
Single Supply Voltage:
– 5 V±10% for M88xxFxY
– 3 V (+20/–10%) for M88xxFxW
1 or 2 Mbit of Primary Flash Memory (8 uniform
sectors, 16K x 8, or 32K x 8)
A second non-volatile memory:
– 256 Kbit (32K x 8) EEPROM (for M8813F1x)
or Flash memory (for M88x3F2x)
– 4 uniform sectors (8K x 8)
SRAM (16 Kbit, 2K x 8; or 64 Kbit, 8K x 8)
Over 3,000 Gates of PLD: DPLD and CPLD
27 Reconfigurable I/O ports
Enhanced JTAG Serial Port
Programmable power management
Stand-by current:
– 50
µA
for M88xxFxY
– 25
µA
for M88xxFxW
High Endurance:
– 100,000 Erase/Write Cycles of Flash Memory
– 10,000 Erase/Write Cycles of EEPROM
– 1,000 Erase/Write Cycles of PLD
PQFP52 (T)
s
s
s
s
s
s
s
s
PLCC52 (K)
Figure 1. Logic Diagram
VCC
DESCRIPTION
The FLASH+PSD family of memory systems for
microcontrollers (MCUs) brings In-System-
Table 1. Signal Names
PA0-PA7
PB0-PB7
PC0-PC7
PC2 = Voltage Stand-by
PD0-PD2
AD0-AD15
CNTL0-CNTL2
RESET
V
CC
V
SS
Port-D
Address/Data
Control
Reset
Supply Voltage
Ground
Port-A
Port-B
Port-C
8
PA0-PA7
3
CNTL0-
CNTL2
16
AD0-AD15
3
RESET
PD0-PD2
FLASH+PSD
8
PC0-PC7
8
PB0-PB7
VSS
AI02856
June 2000
Complete data available on
Data-on-Disc CD-ROM
or at
www.st.com
1/7
M88 FAMILY
Figure 2A. PLCC Connections
CNTL1
CNTL2
RESET
CNTL0
PB0
PB1
PB2
PB3
PB4
PB5
GND
PB6
PB7
Figure 2B. PQFP Connections
40 CNTLO
PD2
PD1
PD0
PC7
PC6
PC5
PC4
VCC
GND
PC3
PC2
PC1
PC0
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
46
45
44
43
42
41
40
39
38
37
36
35
34
27
28
29
31
32
30
33
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
VCC
AD7
AD6
AD5
AD4
GND 19
AD3 26
PA7 14
PA6 15
PA5 16
PA4 17
PA3 18
PA2 20
PA1 21
PA0 22
AD0 23
AD1 24
AD2 25
PD2 1
PD1 2
PD0 3
PC7 4
PC6 5
PC5 6
PC4 7
V
CC
8
GND 9
PC3 10
PC2 11
PC1 12
PC0 13
39 AD15
38 AD14
37 AD13
36 AD12
35 AD11
34 AD10
33 AD9
32 AD8
31 V
CC
30 AD7
29 AD6
28 AD5
27 AD4
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
AD1
AD2
GND
AD0
AD3
AI02857
41 RESET
43 CNTL1
42 CNTL2
46 GND
52 PB0
51 PB1
50 PB2
49 PB3
48 PB4
47 PB5
45 PB6
44 PB7
4
Programmability (ISP) to Flash memory and
programmable logic. The result is a simple and
flexible solution for embedded designs.
FLASH+PSD devices combine many of the
peripheral functions found in MCU based
applications. FLASH+PSD provides a glueless
interface to most commonly-used ROMless
MCUs.
Table 2 summarizes all the devices in the M88
Family.
The CPLD in the FLASH+PSD devices features
an optimized Macrocell logic architecture. The
Macrocell was created to address the unique
requirements of embedded system designs. It
allows direct connection between the system
address/data bus, and the internal FLASH+PSD
Table 2. Product Range
1
Part Number
M8813F1Y
M8813F2Y
M8834F2Y
M8813F1W
M8813F2W
M8834F2W
Primary Flash
Memory
1 Mbit
1 Mbit
2 Mbit
1 Mbit
1 Mbit
2 Mbit
Secondary NVM
256 Kbit EEPROM
256 Kbit Flash memory
256 Kbit Flash memory
256 Kbit EEPROM
256 Kbit Flash memory
256 Kbit Flash memory
SRAM
2
16 Kbit
16 Kbit
64 Kbit
16 Kbit
16 Kbit
64 Kbit
I/O Ports Voltage Range
27
27
27
27
27
27
2.7-3.6 V
150 ns
4.5-5.5 V
90 ns or
150 ns
Access Time
Note: 1. All products support: JTAG serial ISP, MCU parallel ISP, ISP Flash memory, ISP CPLD, Security features, Power Management
Unit (PMU), Automatic Power-down (APD)
2. SRAM may be backed up using an external battery.
7
5
3
2
52
51
50
49
48
47
6
1
AI02858
registers, to simplify communication between the
MCU and other supporting devices.
The FLASH+PSD device includes a JTAG Serial
Programming interface, to allow In-System
Programming (ISP) of the entire device. This
feature reduces development time, simplifies the
manufacturing flow, and dramatically lowers the
cost of field upgrades. Using ST’s special Fast-
JTAG programming, a design can be rapidly
programmed into the FLASH+PSD.
The innovative FLASH+PSD family solves key
problems faced by designers when managing
discrete Flash memory devices, such as:
– Complex address decoding
– In-System (first-time) Programming (ISP)
– Concurrent EEPROM or Flash memory
programming (IAP).
2/7
ADDRESS/DATA/CONTROL BUS
PLD
INPUT
BUS
PAGE
REGISTER
EMBEDDED
ALGORITHM
8 SECTORS
POWER
MANGMT
UNIT
1 OR 2 MBIT PRIMARY
FLASH MEMORY
8
VSTDBY
(PC2)
CNTL0,
CNTL1,
CNTL2
SECTOR
SELECTS
FLASH DECODE
PLD (DPLD)
73
SECTOR
SELECTS
SRAM SELECT
PERIP I/O MODE SELECTS
CSIOP
RUNTIME CONTROL
AND I/O REGISTERS
3 EXT CS TO PORT D
16 OUTPUT MACROCELLS
PORT A ,B & C
24 INPUT MACROCELLS
CLKIN
PORT A ,B & C
16 OR 64 KBIT BATTERY
BACKUP SRAM
256 KBIT SECONDARY
EEPROM or FLASH MEMORY
(BOOT OR DATA)
4 SECTORS
Figure 3. FLASH+PSD Block Diagram
PROG.
MCU BUS
INTRF.
PROG.
PORT
PORT
A
PA0 – PA7
AD0 – AD15
ADIO
PORT
73
FLASH ISP CPLD
(CPLD)
PROG.
PORT
PORT
B
PB0 – PB7
PROG.
PORT
MACROCELL FEEDBACK OR PORT INPUT
CLKIN
PORT
C
PC0 – PC7
GLOBAL
CONFIG. &
SECURITY
PROG.
PORT
CLKIN
(PD1)
PLD, CONFIGURATION
& FLASH MEMORY
LOADER
JTAG
SERIAL
CHANNEL
PORT
D
PD0 – PD2
AI02861D
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M88 FAMILY
3/7
M88 FAMILY
The JTAG Serial Interface block allows In-System
Programming (ISP). Embedded dual-bank
memories eliminates the need for an external Boot
EPROM or Flash memory, or an external
programmer. To simplify Flash memory updates,
program execution is performed from a secondary
Flash memory (for the M88xxF2x) or EEPROM
(for the M8813F1x) while the primary Flash
memory is being updated. This solution avoids the
complicated hardware and software overhead
necessary to implement IAP.
ST makes available a software development tool,
PSDsoft, that generates ANSI-C compliant code
for use with your target MCU. This code allows you
to manipulate the non-volatile memory (NVM)
within the FLASH+PSD. Code examples are also
provided for:
– Flash memory IAP via the UART of the host
MCU
– Memory paging to execute code across several
FLASH+PSD memory pages
– Loading, reading, and manipulation of
FLASH+PSD Macrocells by the MCU.
FLASH+PSD ARCHITECTURAL OVERVIEW
FLASH+PSD devices contain several major
functional blocks. Figure 3 shows the architecture
of the M88 FLASH+PSD device family. The
functions of each block are described briefly in the
following sections. Many of the blocks perform
multiple functions and are user configurable.
Memory
The 1 or 2 Mbit (128K x 8, or 256K x 8) Flash
memory is the primary memory of the
FLASH+PSD. It is divided into eight equally-sized
sectors that are individually selectable.
The 256 Kbit (32K x 8) secondary EEPROM or
Flash memory is divided into four equally-sized
sectors. Each sector is individually selectable.
The SRAM is intended for use as a scratch-pad
memory or as an extension to the MCU SRAM. If
an external battery is connected to Voltage Stand-
by (VSTBY, PC2), data is retained in the event of
power failure.
Each sector of memory can be located in a
different address space as defined by the user.
The access times for all memory types includes
the address latching and DPLD decoding time.
The M8813F1x has 64 bytes of OTP memory for
product identifiers, serial numbers, calibration
constants, etc..
Page Register
The 8-bit Page Register expands the address
range of the MCU by up to 256 times. The paged
address can be used as part of the address space
to access external memory and peripherals, or
4/7
internal memory and I/O. The Page Register can
also be used to change the address mapping of
sectors of the Flash memories into different
memory spaces for IAP.
PLDs
The device contains two PLDs, the Decode PLD
(DPLD) and the Complex PLD (CPLD), each
optimized for a different function, as shown in
Table 3. The functional partitioning of the PLDs
reduces power consumption, optimizes cost/
performance, and eases design entry.
The DPLD is used to decode addresses and to
generate Sector Select signals for the
FLASH+PSD internal memory and registers. The
DPLD has 17 combinatorial outputs, which are
used to select memory sectors and JTAG. The
CPLD has 16 Output Macrocells (OMC) and 3
combinatorial outputs. The CPLD also has 24
Input Macrocells (IMC) that can be configured as
inputs to the PLDs. The PLDs receive their inputs
from the PLD Input Bus and are differentiated by
their output destinations, number of product terms,
and Macrocells.
The PLDs consume minimal power. The speed
and power consumption of the PLD is controlled
by the Turbo bit in the PMMR0 register and other
bits in the PMMR2 registers. These registers are
set by the MCU at run-time. There is a slight
penalty to PLD propagation time when invoking
the power management features.
I/O Ports
The FLASH+PSD has 27 individually configurable
I/O pins distributed over the four ports (Port A, B,
C, and D). Each I/O pin can be individually
configured for different functions. Ports can be
configured as standard MCU I/O ports, PLD I/O, or
latched address outputs for MCUs using
multiplexed address/data buses. Ports A and B
can be configured to be open drain.
The JTAG pins can be enabled on Port C for In-
System Programming (ISP).
Ports A and B can also be configured as a data
port for a non-multiplexed bus or multiplexed
address/data bus for certain types of 8-bit MCUs.
MCU Bus Interface
FLASH+PSD interfaces easily with most 8-bit
MCUs that have either multiplexed or non-
multiplexed address/data buses. The device is
configured to respond to the MCU’s control
signals, which are also used as inputs to the PLDs.
Where there is a requirement to use a 16-bit data
bus to interface to a 16-bit MCU, two PSDs must
be used. For examples, please see the full data
sheet.
M88 FAMILY
Table 3. PLD I/O
Name
Decode PLD (DPLD)
Complex PLD (CPLD)
Inpu ts
73
73
Outputs
17
19
Product
Terms
42
140
Table 4. JTAG SIgnals on Port C
Port C Pins
PC0
PC1
PC3
PC4
TMS
TCK
TSTAT
TERR
TDI
TDO
JTAG Signal
JTAG Port
In-System Programming (ISP) can be performed
through the JTAG signals on Port C. This serial
interface allows complete programming of the
entire FLASH+PSD device. A blank device can be
completely programmed for the first time after it is
soldered to the board. The JTAG signals (TMS,
TCK, TSTAT, TERR, TDI, TDO) can be
multiplexed with other functions on Port C. Table 4
indicates the JTAG pin assignments. Four-pin
JTAG is also fully supported.
In-System Programming (ISP)
Using the JTAG signals on Port C, the entire
FLASH+PSD device can be programmed or
erased without the use of the MCU. The primary
Flash memory can also be programmed in-system
by the MCU executing the programming
algorithms out of the secondary memory, or
SRAM. The secondary memory can be
programmed the same way by executing out of the
primary Flash memory. The PLD or other
FLASH+PSD Configuration blocks can be
programmed through the JTAG port or a device
insertion programmer. Table 5 indicates which
programming methods can program different
functional blocks of the FLASH+PSD.
Power Management Unit (PMU)
The Power Management Unit (PMU) gives the
user control of the power consumption on selected
functional blocks based on system requirements.
The PMU includes an Automatic Power-down
(APD) Unit that turns off device functions during
MCU inactivity. The APD Unit has a Power-down
mode that helps reduce power consumption.
The FLASH+PSD also has some bits that are
configured at run-time by the MCU to reduce
PC5
PC6
power consumption of the CPLD. The Turbo bit in
the PMMR0 register can be reset to 0 and the
CPLD latches its outputs and goes to sleep until
the next transition on its inputs.
Additionally, bits in the PMMR2 register can be set
by the MCU to block signals from entering the
CPLD to reduce power consumption. Please see
the full data sheet for more details.
SECURITY AND NVM SECTOR PROTECTION
A security bit in the Protection Register enables
the software project, coded in the FLASH+PSD, to
be locked up. This bit is only accessible by the
system designer from the JTAG serial port, or from
a parallel insertion programmer. It cannot be
accessed from the MCU. The only way a security
bit can be cleared is to erase the entire chip.
The contents of the sectors of the primary and
secondary NVM blocks can be protected using bits
in the Protection Registers. These bits are
accessible from the MCU in the application code,
or from a programmer during the set-up
procedure.
Table 5. Methods of Programming Different Functional Blocks of the FLASH+PSD
Functional Block
Primary Flash Memory
Secondary EEPROM or Flash memory
PLD Array (DPLD and CPLD)
FLASH+PSD Configuration
OTP Row
JTAG Programming
Yes
Yes
Yes
Yes
No
Device Programmer
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
IAP
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