MDT10P55
1. General Description
This EPROM-Based 8-bit micro-controller uses a fully
static CMOS technology process to achieve higher
speed
and
smaller
size
with
the
low
power
u
u
u
Power-on Reset
Sleep Mode for power saving
5 types of oscillator can be selected by
programming option:
INTRC－Internal 4 MHz RC oscillator
RC－Low cost RC oscillator
LFXT－Low frequency crystal oscillator
XTAL－Standard crystal oscillator
HFXT－High frequency crystal oscillator
consump-tion and high noise immunity. On chip
memory inclu-des 1K words of ROM, and 72 b
ytes of
static RAM.
2. Features
The followings are some of the features on the
hardware and software :
u
u
u
u
u
u
u
u
u
u
Fully COMS static design
8-bit data bus
On chip EPROM size : 1K words
Internal RAM size : 72 bytes
36 single word instructions
14-bit instructions
2-level stacks
Operating voltage : 2.5 V ~ 6.0 V
Operating frequency : 0 ~ 20 MHz
The most fast execution time is 200 ns under
20 MHz in all single cycle instructions except
the branch instruction
u
Addressing modes include direct, indirect and
relative addressing modes
u
3 oscillator start-up time can be selected by
programming option:
20 ms, 40 ms, 80 ms
u
8-bit real time clock/counter(RTCC) with 8-bit
programmable prescaler
u
On-chip RC oscillator based Watchdog
Timer(WDT)
u
Wake-up from sleep on pin change
3. Applications
The application areas of this MDT10P55 range from
appliance motor control and high speed automotive
to low power remote transmitters/receivers, small
instruments, chargers, toy, automobile and PC
pe-ripheral … etc.
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 1
2003/5 Ver. 1.2
MDT10P55
4. Pin Assignment
MDT10P55A1P/MDT10P55A1S
MDT10P55A3P/MDT10P55A3S
VDD
PB5
PB4
PB3
PC5/RTCC
PC4
PC3
VDD
OSC1
OSC2/PB4
PB3
PC5/RTCC
PC4
PC3
1
2
3
4
5
6
7
1
2
3
4
5
6
7
14
13
12
11
10
9
8
14
12
12
11
10
9
8
VSS
PB0
PB1
PB2
PC0
PC1
PC2
VSS
PB0
PB1
PB2
PC0
PC1
PC2
VDD
PB5
PB4
/MCLR
PC5/RTCC
PC4
PC3
VDD
OSC1
OSC2/PB4
/MCLR
PC5/RTCC
PC4
PC3
1
2
3
4
5
6
7
1
2
3
4
5
6
7
14
13
12
11
10
9
8
14
13
12
11
10
9
8
VSS
PB0
PB1
PB2
PC0
PC1
PC2
VSS
PB0
PB1
PB2
PC0
PC1
PC2
MDT10P55A2P/MDT10P55A2S
MDT10P55A4P/MDT10P55A4S
5. Pin Function Description
Pin Name
PB5~0
PC4~0
PC5/RTCC
/MCLR
OSC1
OSC2
V
dd
V
ss
I/O
I/O
I/O
I/O
I
I
O
Function Description
Port B, TTL input level，PB3 input only.
Port C, TTL input level
Real Time Clock/Counter, Schmitt Trigger input levels
Master Clear, Schmitt Trigger input levels
Oscillator Input
Oscillator Output
Power supply
Ground
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 2
2003/5 Ver. 1.2
MDT10P55
6. Memory Map
(A) Register Map
Address
00
01
02
03
04
06
07
08~1F
30~3F
50~5F
70~7F
Description
Indirect Addressing Register
RTCC
PC
STATUS
MSR
Port B
Port C
General purpose registers
(1)IAR ( Indirect Address Register) : R0
(2) RTCC (Real Time Counter/Counter Register) : R1
(3) PC (Program Counter) : R2
Write PC, CALL --- always 0
JUMP --- from instruction word
RTIW, RET --- from STACK
A9
A8
Write PC, JUMP, CALL --- from STATUS b5
RTIW, RET --- from STACK
A7~A0
Write PC --- from ALU
JUMP, CALL --- from instruction word
RTIW, RET --- from STACK
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 3
2003/5 Ver. 1.2
MDT10P55
(4) STATUS (Status register) : R3
Bit
0
1
2
3
4
5
6
7
Symbol
C
HC
Z
PF
TF
PAGE
——
PCWUF
Carry bit
Half Carry bit
Zero bit
Power down bit
Function
WDT Timer overflow Flag bit
ROM page select bit
Unimplemented
Pin change wake up from sleep
(5) MSR (Memory Bank Select Register) : R4
b7
b6
b5
b4
b3
b2
b1
b0
Read only “1”
BANK Select
Indirect Addressing Mode
(6) PORT B : R6
PB5~PB0, I/O Register
，PB3
input only.
(7) PORT C: R7
PC5~PC0, I/O Register
(8) TMR (Time Mode Register)
Bit
Symbol
Prescaler Value
0 0 0
0 0 1
0
2—0
PS2—0
1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Prescaler assignment bit :
0
—
RTCC
1
—
Watchdog Timer
Function
RTCC rate
1:2
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
WDT rate
1:1
1:2
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
3
PSC
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 4
2003/5 Ver. 1.2
MDT10P55
Bit
4
Symbol
TCE
Function
RTCC signal Edge :
0
—
Increment on low-to-high transition on RTCC pin
1
—
Increment on high-to-low transition on RTCC pin
RTCC signal set :
0
—
Internal instruction cycle clock
1
—
Transition on RTCC pin
PortB pull-high :
0
—
Enable
1
—
Disable
PortB wake-up :
0
—
Enable
1
—
Disable
5
TCS
6
PBPHB
7
PBWUB
(9) CPIO B
，CPIO
C (Control Port I/O Mode Register)
The CPIO register is “write-only”
＝“0”,
I/O pin in output mode;
＝“1”,
I/O pin in input mode.
(10) Configurable options for EPROM (Set by writer) :
Oscillator Type
INTRC Oscillator
RC
Oscillator
Oscillator Start-up Time
20ms,40ms,80ms
20ms,40ms,80ms
20 ms,40ms,80ms
20ms,40 ms,80ms
20ms,40 ms,80 ms
HFXT Oscillator
XTAL Oscillator
LFXT Oscillator
Watchdog Timer control
Watchdog timer disable all the time
Watchdog timer enable all the time
Security state
Security weak Disable
Security Disable
Security Enable
The default security state of EPROM is weak disable. Once the IC was set to
enable or disable, it’s forbidden to change.
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 5
2003/5 Ver. 1.2
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