HD64F2638F20J Datasheet, PDF (69/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 1 Overview
Type
Symbol
I/O
Operating mode MD2 to MD0 Input
control
Name and Function
Mode pins: These pins set the operating mode.
The relation between the settings of pins MD2 to MD0
and the operating mode is shown below. These pins
should not be changed while the H8S/2636 is
operating.
MD2 MD1 MD0 Operating Mode
0
0
0
—
1
—
1
0
—
1
—
1
0
0
Mode 4
1
Mode 5
1
0
Mode 6
1
Mode 7
System control
Interrupts
Address bus
Data bus
Bus control
RES
STBY
FWE^*2
NMI
Input
Input
Input
Input
IRQ5 to IRQ0 Input
A23 to A0
D15 to D0
Output
I/O
AS
Output
RD
Output
HWR
Output
Reset input: When this pin is driven low, the chip is
reset.
Standby: When this pin is driven low, a transition is
made to hardware standby mode.
Flash write enable: Pin for flash memory use (in
planning stage).
Nonmaskable interrupt: Requests a nonmaskable
interrupt. When this pin is not used, it should be fixed
high.
Interrupt request 5 to 0: These pins request a
maskable interrupt.
Address bus: These pins output an address.
Data bus: These pins constitute a bidirectional data
bus.
Address strobe: When this pin is low, it indicates that
address output on the address bus is enabled.
Read: When this pin is low, it indicates that the
external address space can be read.
High write: A strobe signal that writes to external space
and indicates that the upper half (D15 to D8) of the
data bus is enabled.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 19 of 1458