Sharp AM-900 Service Manual page 82

AM-900U
2.2. Printer control block
Printer control block is composed by a single chip microcomputer
"HD64F36049" which built in a 16bit CPU, 96kbyte flash ROM and
3kbyte RAM.
2.2.1 HD64F36049 (IC21): pin-80 QFP
Feature
High-speed H8/300H central processing unit with an internal 16bit
architecture.
• Upward-compatible with H8/300 CPU on an object level
Sixteen 16bit general registers
62 basic instructions
• Various peripheral functions
Timer B1 (8bit timer)
P17/IRQ3/TRGV
P16/IRQ2
P15/IRQ1/TMIB1
P14/IRQ0
P11/PWM
P10/TMOW
P22/TXD
P21/RXD
P20/SCK3
P57/SCL
P56/SDA
P55/WKP5/ADTRG
P54/WKP4
P53/WKP3
P52/WKP2
P51/WKP1
P50/WKP0
System
Subclock
clock
generator
generator
P12
P24
P23
P37
P36
P35
P34
P33
P32
P31
P31
Timer V (8bit timer)
Timer W (16bit timer)
Timer Z (16bit timer)
14bit PWM)
Watchdog timer
SC13 (Asynchronous or clocked synchronous serial communica-
tion interface) x 3 channels
10bit A/D converter
• On-chip memory
ROM (F-ZTAT): 96kbytes
RAM: 4kbytes
• Operation frequency: 20MHz
CPU
H8/300H
Data bus(lower)
RAM
ROM
IIC2
RTC SCI3
14-bit
SCI3_2
PWM
Timer Z SCI3_3
Watchdog
Timer V
timer
Timer W Timer B1
A/D converter
Data bus(upper)
Address bus
Port B
Fig. 5
5 – 9
P67/FTIOD1
P66/FTIOC1
P65/FTIOB1
P64/FTIOA1
P63/FTIOD0
P62/FTIOC0
P61/FTIOB0
P60/FTIOA0
P77
P76/TMOV
P75/TMCIV
P74/TMRIV
P72/TXD_2
P71/RXD_2
P70/SCK3_2
P87
P86
P85
P84/FTIOD
P83/FTIOC
P82/FTIOB
P81/FTIOA
P80/FTCI
P97
P96
P95
P94
P93
P92/TXD_3
P91/RXD_3
P90/SCK3_3