Rainbow Electronics ATAR862-3 - Manual (Page 5)

5
ATAR862-3
4556B–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
EEPROM 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
rt
2
D
a
ta
d
ir
e
c
ti
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
2 x 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
ATAR862-3