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CPU
2
F
MC-16
X0
Clock
X1
control
RST
circuit
DATA01~08
Centronics
EXPRM
interface
INPRM
control
DSTB
circuit
*ACK
BUSY
*FAULT
SLCT
*AFXT
*SLCTIN
*FLTO
RS-232C
*RC
interface
RCD
control
*DTR
circuit
*TD
*RTD
*RD
*DSR
*CTS
*CD
*SDIN
*THSN
Analog to
MPSEN
digital
LV34
converter
Timer
control
circuit
Figure 5.20 MB90706 block diagram
ADDRESS
DATA
CLK
SPM00~03
Space motor
control circuit
SPI01~02
Paper feed
LFM00~03
motor control
circuit
LFI01~02
Color ribbon
CLM00~03
shift motor
control circuit
MA00~01
Quasi-SRAM
*RAS
and DRAM
*CAS
controller
*CASH
*OPDOT
Control panel
*SHIFT
control citcuit
*LOAD
*CS00X~04X
Chip select
*IOSX
decoder
*OASX
8×8 data
converter
*LOAD
HDTIN
BZCLK
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