HD6413003RF Datasheet, PDF (30/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Table 1-3 Pin Functions (cont)
Pin No.
Type
Symbol QFP-112 I/O Name and Function
System control RES
71
Input Reset input: When driven low, this pin resets
the H8/3003
RESO
19
Output Reset output: Outputs a reset signal to
external devices
STBY
70
Input Standby: When driven low, this pin forces
a transition to hardware standby mode
BREQ
67
Input Bus request: Used by an external bus master
to request the bus right from the H8/3003
BACK
68
Output Bus request acknowledge: Indicates that the
bus has been granted to an external bus
master
Interrupts
NMI
72
Input Nonmaskable interrupt: Requests a
nonmaskable interrupt
IRQ₇ to
IRQ₀
18 to 17, Input
25 to 24,
103 to 101
Interrupt request 7 to 0: Maskable interrupt
request pins
Address bus
A₂₃ to A₀
98 to 95,
65 to 54,
52 to 45
Output Address bus: Outputs address signals
Data bus
D₁₅ to D₀ 43 to 36
34 to 27
Input/ Data bus: Bidirectional data bus
output
Bus control
CS₇ to CS₀ 16 to 13 Output Chip select: Select signals for areas 7 to 0
101 to 104
AS
77
Output Address strobe: Goes low to indicate valid
address output on the address bus
RD
78
Output Read: Goes low to indicate reading from the
external address space
HWR
79
LWR
80
WAIT
66
Output High write: Goes low to indicate writing to the
external address space; indicates valid data on
the upper data bus (D₁₅ to D₈).
Output Low write: Goes low to indicate writing to the
external address space; indicates valid data on
the lower data bus (D₇ to D₀).
Input
Wait: Requests insertion of wait states in bus
cycles during access to the external address
space
12