HD6473032F16 Datasheet, PDF (44/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 1 Overview
Type
Symbol
System control RES
FWE
STBY
BREQ
BACK
Pin No.
63
10
62
59
60
I/O
Input
Input
Input
Input
Output
Interrupts
NMI
64
Input
Address bus
Data bus
Bus control
IRQ5 to IRQ0 17, 16,
90 to 87
A23 to A0
97 to 100,
56 to 45,
43 to 36
D15 to D0
34 to 23,
21 to 18
CS7 to CS0 8, 97 to 99,
88 to 91
AS
69
Input
Output
Input/
output
Output
Output
RD
70
Output
HWR
71
Output
LWR
72
Output
WAIT
58
Input
Name and Function
Reset input: When driven low, this pin
resets the chip
Flash write enable: Allows program mode
setting.
Standby: When driven low, this pin forces a
transition to hardware standby mode
Bus request: Used by an external bus
master to request the bus right
Bus request acknowledge: Indicates that
the bus has been granted to an external bus
master
Nonmaskable interrupt: Requests a
nonmaskable interrupt
Interrupt request 5 to 0: Maskable
interrupt request pins
Address bus: Outputs address signals
Data bus: Bidirectional data bus
Chip select: Select signals for areas 7 to 0
Address strobe: Goes low to indicate valid
address output on the address bus
Read: Goes low to indicate reading from
the external address space
High write: Goes low to indicate writing to
the external address space; indicates valid
data on the upper data bus (D15 to D8).
Low write: Goes low to indicate writing to
the external address space; indicates valid
data on the lower data bus (D7 to D0).
Wait: Requests insertion of wait states in
bus cycles during access to the external
address space
Rev. 3.00 Mar 21, 2006 page 14 of 814
REJ09B0302-0300