HD6473258CP10 Datasheet, PDF (15/301 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

1.2 Block Diagram
Figure 1-1 shows a block diagram of the H8/325 Series.
P10/A0
P11/A1
P12/A2
P13/A3
P14/A4
P15/A5
P16/A6
P17/A7
P20/A8
P21/A9
P22/A10
P23/A11
P24/A12
P25/A13
P26/A14
P27/A15
Clock
pulse
gener-
ator
CPU
H8/300
Data bus (Low)
PROM*
(or masked
ROM)
Serial
communication
(2 channels)
RAM
16-Bit
free-running
timer
8-Bit timer
(2 channels)
Port 5
Port 6
Port 4
P70/IS
P71/OS
P72/BUSY
P73/IOS
P74/AS
P75/WR
P76/RD
P77/WAIT
P30/D0
P31/D1
P32/D2
P33/D3
P34/D4
P35/D5
P36/D6
P37/D7
Memory size
H8/3257 H8/3256 H8/325 H8/324 H8/323 H8/322
ROM 60 kbytes 48 kbytes 32 kbytes 24 kbytes 16 kbytes 8 kbytes
RAM 2 kbytes 2 kbytes 1 kbyte 1 kbyte 512 bytes 256 bytes
* H8/3257, H8/3256, H8/325, H8/323, and H8/322 are available with PROM.
Figure 1-1. Block Diagram
Figure 1-1
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