Rainbow-electronics ATAR862-8 User Manual download pdf (Page 5)

5

ATAR862-8

4589B–4BMCU–02/03

Figure 3. Block Diagram

CLK

PA_ENABLE

ANT2

ANT1

ENABLE

GND

VS

XTAL

VCO

LF

CP

PFD

f

32

XTO

PLL

PA

f

4

Power up /

down

Voltage monitor

External input

UTCM

OSC1

OSC2

I/O bus

ROM

RAM

4-bit CPU core

256 x 4 bit

Data direction +

alternate function

Data direction +

interrupt control

Port 4

Port 5

Data direction +

alternate function

Port 6

Timer 3

Brown-out protect.

RESET

Clock management

Timer 1

watchdog timer

Timer 2

Serial interface

Port 1

P

o

r

t

2

D

a

t

a

d

i

r

e

c

t

i

o

n

T2O

SD

SC

T3O

T3I

BP10

BP13

BP20/NTE

BP21

BP22

BP23

RC

oscillators

Crystal

oscillators

4 K x 8 bit

VMI

with modulator

SSI

External

clock input

interval- and

8/12-bit timer

8-bit

timer / counter

with modulator

and demodulator

T2I

EEPROM

32 x 16 bit

BP40

INT3

SC

T2I

BP41

VMI

SD

BP43

INT3

BP42

T2O

BP53

INT1

BP52

INT1

BP50

INT6

BP51

INT6

BP60

T3O

BP63

T3I

V

SS

V

DD

NRESET

µC

ATAR862-8

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