HD6412350 Hitachi, HD6412350 Datasheet - Page 142

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

6.1.3
Table 6-1 summarizes the pins of the bus controller.
Table 6-1
Name
Address strobe
Read
High write/write enable
Low write
Chip select 0
Chip select 1
Chip select 2/row address
strobe 2
Chip select 3/row address
strobe 3
Chip select 4/row address
strobe 4
Chip select 5/row address
strobe 5
Chip select 6
Chip select 7
122
Pin Configuration
Bus Controller Pins
Symbol I/O
AS
RD
HWR
LWR
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Function
Strobe signal indicating that address output
on address bus is enabled.
Strobe signal indicating that external space
is being read.
Strobe signal indicating that external space
is to be written, and upper half (D
data bus is enabled.
2-CAS DRAM write enable signal.
Strobe signal indicating that external space
is to be written, and lower half (D
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 when
area 2 is in DRAM space.
Strobe signal indicating that area 3 is
selected.
DRAM row address strobe signal when
area 3 is in DRAM space.
Strobe signal indicating that area 4 is
selected.
DRAM row address strobe signal when
area 4 is in DRAM space.
Strobe signal indicating that area 5 is
selected.
DRAM row address strobe signal when
area 5 is in DRAM space.
Strobe signal indicating that area 6 is
selected.
Strobe signal indicating that area 7 is
selected.
7
15
to D
to D
0
) of
8
) of