pcd3349a NXP Semiconductors, pcd3349a Datasheet - Page 4

• Manufacturer Part Number: pcd3349a
• Description: 8-bit Microcontroller With Dtmf Generator
• Manufacturer: NXP Semiconductors

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FREQUENCY
INTERNAL
CLOCK
POWER-ON-RESET
30
32
T1
RESET
REGISTER
HGF
8
8
GENERATOR
COUNTER
SINE WAVE
TIMER/
EVENT
FILTER
TONE
8
timer interrupt
REGISTER
V POR
LGF
8
8
INTERRUPT
LOGIC
8
external interrupt
STOP
IDLE
FLIP-FLOP
PORT 2
ACCUMULATOR
4
INTERRUPT
8
P2.0 to P2.3
CE / T0
BUFFER
PORT 2
4
TEMPORARY
REGISTER 2
INITIALIZE
8
CONTROL & TIMING
RESET
FLIP-FLOP
TEMPORARY
Fig.1 Block diagram.
REGISTER 1
PORT 1
8
8
XTAL 1
OSCILLATOR
P1.0 to P1.7
BUFFER
PORT 1
ARITHMETIC
LOGIC UNIT
PCD3349A
DECIMAL
8
ADJUST
XTAL 2
FLIP-FLOPS
MEMORY
BANK
8
RESIDENT ROM
INSTRUCTION
PROGRAM
COUNTER
REGISTER
DECODER
DECODE
HIGHER
4 kbytes
5
8
&
CONDITIONAL
BRANCH
LOGIC
PROGRAM
COUNTER
LOWER
8
8
ADDRESS
REGISTER
TIMER
ACC
ACC BIT
T1
CARRY
CE / T0
FLAG
TEST
RAM
8
PROGRAM
STATUS
WORD
8
FLIP-FLOP
PORT 0
D
E
C
O
D
E
RESIDENT RAM ARRAY
(VARIABLE LENGTH)
OPTIONAL SECOND
MULTIPLEXER
8 LEVEL STACK
P0.0 to P0.7
REGISTER BANK
224 bytes
BUFFER
DATA STORE
PORT 0
REGISTER 0
REGISTER 1
REGISTER 2
REGISTER 3
REGISTER 4
REGISTER 5
REGISTER 6
REGISTER 7
8
8
8
MBG098