h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 117

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

6.2
Table 6.1 shows the pin configuration of the bus controller.
Table 6.1
Name
Address strobe
Read
High write
Low write
Chip select 0
Chip select 1
Chip select 2/
row address strobe
Chip select 3
Upper column address strobe
Lower column address strobe
Data transfer acknowledge 3
(DMAC)
Data transfer acknowledge 2
(DMAC)
Data transfer acknowledge 1
(DMAC)
Data transfer acknowledge 0
(DMAC)
Input/Output Pins
Pin Configuration
Symbol
AS
RD
HWR
LWR
CS0
CS1
CS2/
RAS
CS3
UCAS
LCAS
DACK3
DACK2
DACK1
DACK0
I/O
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Function
Strobe signal indicating that normal space
is accessed and address output on
address bus is enabled.
Strobe signal indicating that normal space
is being read.
Strobe signal indicating that normal space
is written to, and upper half (D15 to D8) of
data bus is enabled.
Strobe signal indicating that normal space
is written to, and lower half (D7 to D0) of
data bus is enabled.
Strobe signal indicating that area 0 is
selected.
Strobe signal indicating that area 1 is
selected
Strobe signal indicating that area 2 is
selected/DRAM row address strobe signal
Strobe signal indicating that area 3 is
selected.
16-bit DRAM space upper column address
strobe signal or 8-bit DRAM space column
address strobe signal
16-bit DRAM space lower column address
strobe signal
Data transfer acknowledge signal for single
address transfer by DMAC channel 3.
Data transfer acknowledge signal for single
address transfer by DMAC channel 2.
Data transfer acknowledge signal for single
address transfer by DMAC channel 1.
Data transfer acknowledge signal for single
address transfer by DMAC channel 0.
Rev. 2.00, 03/04, page 85 of 534