Ordering number : ENA1795A
LC8784P7PB/P6PB/M4PB
/J3PB/J2PB/G1PB/G0PB
/C8PB/96PB
CMOS IC
http://onsemi.com
8-bit ETR Microcontroller
ROM 256K byte (Max size)
RAM 12K byte (Max size)
Overview
The LC8784P7PB/P6PB/M4PB/J3PB/J2PB/G1PB/G0PB/C8PB/96PB is an 8-bit ETR microcomputer that, centered
around a CPU running at a minimum bus cycle time of 74.07 ns, integrate on a single chip a number of hardware
features such as 256K-byte ROM (Max size), 12K-byte RAM (Max size), direct control of necessary CD mechanism
and CD-DSP for car audio, two sophisticated 16-bit timers/counters (may be divided into 8-bit timers), four 8-bit timers
with a prescaler, a base timer serving as a time-of-day clock, two synchronous SIO ports (with automatic block
transmission/reception capabilities), an asynchronous/synchronous SIO port, two UART ports (full duplex), four
12-bit PWM channels, an 8-bit 10-channel AD converter, a high-speed clock counter, a system clock frequency divider,
and a 29-source 10-vector interrupt feature.
Features
Model name
LC878496PB
LC8784C8PB
LC8784G0PB
LC8784G1PB
LC8784J2PB
LC8784J3PB
LC8784M4PB
LC8784P6PB
LC8784P7PB
ROM size (Byte)
96K
128K
160K
160K
192K
192K
224K
256K
256K
RAM size (Byte)
6K
6K
6K
8K
8K
10K
10K
10K
12K
Semiconductor Components Industries, LLC, 2013
July, 2013
11613HKPC/71410HKPC 20100618- S00013 No.A1795-1/29
LC8784P7PB/P6PB/M4PB/J3PB/J2PB/G1PB/G0PB/C8PB/96PB
■
Minimum Bus Cycle Time
•
74.07ns (13.5MHz)
Note: Bus cycle time indicates the speed to read ROM.
■
Minimum Instruction Cycle Time (tCYC)
•
222ns (13.5MHz)
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Ports
•
Normal withstand voltage I/O ports
Ports whose I/O direction can be designated in 1 bit units: 57 (P1n, P2n, P30 to P35, P70 to P73, P8n, PBn, PCn,
SI2Pm, PWM0, PWM1, XT2, n=0 to 7, m=0 to 3)
Ports whose I/O direction can be designated in 2 bit units: 16 (PEn, PFn n=0 to 7)
Ports whose I/O direction can be designated in 4 bit units: 8 (P0n n=0 to 7)
•
Normal withstand voltage input ports:
1 (XT1)
•
Internal low voltage output ports:
1 (VREG)
•
Dedicated oscillator ports:
2 (CF1, CF2)
•
Reset pin:
1 (RES)
•
Digital power pins:
6 (VSSn, VDDn n=1, 2, 4)
•
Analogue power pins:
2 (AVSS, AVDD)
•
Timer 0: 16-bit programmable timer/counter with capture register
Mode 0: 8-bit programmable timer with an 8-bit programmable prescaler
(with two 8-bit capture registers)
×
2 channels
Mode 1: 8-bit programmable timer with an 8-bit programmable prescaler
(with two 8-bit capture registers) + 8-bit programmable counter (with two 8-bit capture registers)
Mode 2: 16-bit programmable timer with an 8-bit programmable prescaler
(with two 16-bit capture registers)
Mode 3: 16-bit programmable counter (with 2 16-bit capture registers)
•
Timer 1: 16-bit programmable timer/counter that support PWM/ toggle output
Mode 0: 8-bit programmable timer with an 8-bit prescaler (with toggle outputs)
+ 8-bit programmable timer/counter (with toggle outputs)
Mode 1: 8-bit PWM with an 8-bit prescaler
×
2 channels
Mode 2: 16-bit programmable timer/counter with an 8-bit prescaler (with toggle outputs)
(toggle outputs also from the lower-order 8 bits)
Mode 3: 16-bit programmable timer with an 8-bit prescaler (with toggle outputs)
(The lower-order 8 bits can be used as PWM.)
•
Timer 4: 8-bit programmable timer with a 6-bit prescaler
•
Timer 5: 8-bit programmable timer with a 6-bit prescaler
•
Timer 6: 8-bit programmable timer with a 6-bit prescaler (with toggle outputs)
•
Timer 7: 8-bit programmable timer with a 6-bit prescaler (with toggle outputs)
•
Base timer
1) The clock is selectable from the subclock (32.768kHz crystal oscillator), cycle clock (tCYC), and timer 0
prescaler output.
2) Interrupts programmable in 5 different time schemes.
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Timers
No.A1795-2/29
LC8784P7PB/P6PB/M4PB/J3PB/J2PB/G1PB/G0PB/C8PB/96PB
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High speed clock counter
1) Can count clocks with a maximum clock rate of 20MHz
(When High-speed clock counter is used, timer 0 cannot be used).
2) Can generate output real time.
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SIO: 3 channels
•
SIO 0: 8 bit synchronous serial interface
1) LSB first/MSB first mode selectable
2) Built-in 8-bit baudrate generator (4/3 to 512/3 tCYC transfer clock cycle)
3) Automatic continuous data transmission (1 to 256 bits)
•
SIO 1: 8 bit asynchronous/synchronous serial interface
Mode 0: Synchronous 8-bit serial I/O (2 to or 3 to wire configuration, 2 to 512 tCYC transfer clocks)
Mode 1: Asynchronous serial I/O (Half-duplex, 8 data bits, 1 stop bit, 8 to 2048 tCYC baudrates)
Mode 2: Bus mode 1 (start bit, 8 data bits, 2 to 512 tCYC transfer clocks)
Mode 3: Bus mode 2 (start detect, 8 data bits, stop detect)
•
SIO2: 8 bit synchronous serial interface
1) LSB first mode
2) Built-in 3-bit baudrate generator (4/3 to 512/3 tCYC transfer clock cycle)
3) Automatic continuous data transmission (1 to 32 bytes)
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UART: 2 channels
1) Full duplex
2) 7/8/9 bit data bits selectable
3) 1 stop bit (2 bits in continuous transmission mode)
4) Built-in 8-bit baudrate generator (with baudrates of 16/3 to 8192/3 tCYC)
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AD Converter: 8 bits
×
10 channels
■
PWM: Multifrequency 12-bit PWM
×
4 channels
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Remote control receiver noise filtering function (sharing pins with P73, INT3, and T0IN)
1) Noise filter time constant selectable from 1 tCYC, 32 tCYC, and 128 tCYC
2) The noise filtering function is available for the INT3, T0IN, or T0HCP signal at P73. When P73 is read with an
instruction, the signal level at that pin is read regardless of the availability of the noise filtering function.
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Watchdog timer
•
External RC watchdog timer
•
Interrupt and reset signals selectable
No.A1795-3/29
LC8784P7PB/P6PB/M4PB/J3PB/J2PB/G1PB/G0PB/C8PB/96PB
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Interrupts
•
29 sources, 10 vector addresses
1) Provides three levels (low (L), high (H), and highest (X)) of multiplex interrupt control. Any interrupt requests of
the level equal to or lower than the current interrupt are not accepted.
2) When interrupt requests to two or more vector addresses occur at the same time, the interrupt of the highest level
takes precedence over the other interrupts. For interrupts of the same level, the interrupt into the smallest vector
address takes precedence.
No.
1
2
3
4
5
6
7
8
9
10
Vector
00003H
0000BH
00013H
0001BH
00023H
0002BH
00033H
0003BH
00043H
0004BH
Selectable Level
X or L
X or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
INT0
INT1
INT2/T0L/INT4
INT3/INT5/Base timer (BT0, 1)
T0H/INT6
T1L/T1H/INT7
SIO0/UART1 receive/UART2 receive
SIO1/SIO2/UART1 transmit/UART2 transmit
ADC/T6/T7/PWM4, PWM5
Port 0/T4/T5/PWM0, PWM1
Interrupt signal
•
Priority levels X
>
H
>
L
•
Of interrupts of the same level, the one with the smallest vector address takes precedence.
•
The Base timers are two interrupt sources of BT0 and BT1, it is one interrupt source by PWM0 and 1, it is one
interrupt source by PWM4 and 5.
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Subroutine stack levels
•
16 bits
×
8 bits
•
24 bits
×
16 bits
•
16 bits
÷
8 bits
•
24 bits
÷
16 bits
•
6144 levels maximum (1/2 of capacity of RAM, the stack is allocated in RAM.)
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High-speed multiplication/division instructions
(5 tCYC execution time)
(12 tCYC execution time)
(8 tCYC execution time)
(12 tCYC execution time)
■
Oscillation circuits
•
RC oscillator circuit (internal):
•
Main XT crystal oscillator circuit:
•
Sub XT crystal oscillator circuit:
For system clock
For system clock with internal Rf and external Rd
For time-of-day clock, for low-speed system clock with internal Rf
and external Rd
•
Multifrequency RC oscillator circuit (internal): For system clock
■
System clock divider function
•
Can run on low current.
•
The minimum instruction cycle selectable from 222ns, 444ns, 888ns, 1.78μs, 3.55μs, 7.10μs, 14.2μs, 28.4μs,
and 56.8μs.
No.A1795-4/29
LC8784P7PB/P6PB/M4PB/J3PB/J2PB/G1PB/G0PB/C8PB/96PB
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Standby function
•
HALT mode: Halts instruction execution while allowing the peripheral circuits to continue operation.
1) Oscillation is not halted automatically.
2) Canceled by system reset, detection VDET0 or occurrence of interrupt.
•
HOLD mode: Suspends instruction execution and the operation of the peripheral circuits.
1) The main XT crystal oscillators, RC, and sub XT crystal oscillators automatically stop operation.
2) There are four ways of resetting the HOLD mode.
(1) Setting the Reset pin to the lower level.
(2) Voltage descent detection (VDET1)
(3) Setting at least one of the INT0, INT1, INT2, INT4, and INT5 pins to the specified level.
(4) Having an interrupt source established at port 0.
•
X'tal HOLD mode: Suspends instruction execution and the operation of the peripheral circuits except the base timer.
1) The main XT crystal oscillators, and RC oscillators automatically stop operation.
2) The state of crystal oscillation established when the HOLD mode is entered is retained.
3) There are five ways of resetting the X'tal HOLD mode.
(1) Setting the Reset pin to the low level.
(2) Voltage descent detection (VDET0)
(3) Setting at least one of the INT0, INT1, INT2, INT4, and INT5 pins to the specified level.
(4) Having an interrupt source established at port 0.
(5) Having an interrupt source established in the base timer circuit.
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Reset
•
External reset
•
Voltage descent detection (VDET0, VDET1) reset circuit (internal)
•
QIP100E (Lead Free Product)
•
LC87F83P7PB
•
LC87F83P7PBU (User writing)
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Shipping form
■
Flash ROM version
No.A1795-5/29
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