h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 73

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Type
Operating
mode
control
System
control
Address
bus
Data bus
Bus control
Symbol
MD1
MD0
RES
STBY
A15 to
A0
D7 to
D0
WAIT
RD
WR
AS/IOS
Pin No.
FP-80A
TFP-80C
4
5
1
7
48 to 55,
57 to 64
72 to 65
13
16
17
15
I/O
Input
Input
Input
Output Address bus: These pins output an address.
Input/
output
Input
Output Read: When this pin is low, it indicates that the
Output Write: When this pin is low, it indicates that the
Output Address strobe: When this pin is low, it indicates
Name and Function
Mode pins: These pins set the operating mode.
The relation between the settings of pins MD1 and
MD0 and the operating mode is shown below.
These pins should not be changed while the MCU
is operating.
MD1 MD0
0
1
1
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.
Data bus (upper): Bidirectional data bus.
Used for 8-bit data.
Wait: Requests insertion of a wait state in the bus
cycle when accessing external 3-state address
space.
external address space is being read.
external address space is being written to.
that address output on the address bus is valid.
1
0
1
Rev. 4.00 Jun 06, 2006 page 19 of 1004
Operating
Mode
Mode 1
Mode 2
Mode 3
Description
Normal
Advanced
Normal
Expanded mode with
on-chip ROM disabled
Expanded mode with
on-chip ROM enabled
or single-chip mode
Expanded mode with
on-chip ROM enabled
or single-chip mode
Section 1 Overview
REJ09B0301-0400