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PCF84C12A Datasheet(PDF) 4 Page - NXP Semiconductors

Part # PCF84C12A
Description  8-bit microcontroller
Download  16 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF84C12A Datasheet(HTML) 4 Page - NXP Semiconductors

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OSCILLATOR
MBC951
PORT 0
FLIP-FLOPS
PORT 0
BUFFER
8
HIGHER
PROGRAM
COUNTER
LOWER
PROGRAM
COUNTER
PROGRAM
STATUS
WORD
MEMORY
BANK
FLIP-FLOPS
RESIDENT ROM
1 kbyte
(PCF84C12A)
2 kbytes
(PCF84C22A)
4 kbytes
(PCF84C42A)
DECODE
5
888
8
P0.7 to P0.0
RAM
ADDRESS
REGISTER
(8)
ACCUMULATOR
TEMPORARY
REGISTER 1
TEMPORARY
REGISTER 2
ARITHMETIC
LOGIC UNIT
INSTRUCTION
REGISTER
&
DECODER
DECIMAL
ADJUST
CONTROL & TIMING
XTAL 2
XTAL 1
RESET
INT / T0
STOP
IDLE
INTERRUPT
INITIALIZE
CONDITIONAL
BRANCH
LOGIC
INT / T0
TEST 1
TIMER
FLAG
CARRY
ACC
ACC BIT
TEST
RESIDENT RAM ARRAY
64 bytes
MULTIPLEXER
8 LEVEL STACK
(VARIABLE LENGTH)
OPTIONAL SECOND
REGISTER BANK
DATA STORE
D
E
C
O
D
E
REGISTER 0
REGISTER 1
REGISTER 2
REGISTER 3
REGISTER 4
REGISTER 5
REGISTER 6
REGISTER 7
PORT 1
FLIP-FLOPS
PORT 1
BUFFER
P1.0 to P1.4
5
3
TIMER/
EVENT
COUNTER
32
INTERNAL
CLOCK
FREQ.
30
TEST 1
88
8
8
8
INTERRUPT
LOGIC
timer interrupt
external interrupt
Fig.1 Block diagram of PCF84C12A.


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