HD6432670 Hitachi, HD6432670 Datasheet - Page 168

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Rev. 2.0, 04/02, page 122 of 906
Name
Chip select 4/row address
strobe 4/write enable*
Chip select 5/row address
strobe 5/SDRAM
Chip select 6
Chip select 7
Upper column address
strobe/upper data mask enable
Lower column address strobe/
lower data mask enable
Output enable/clock enable
Wait
Bus request
Bus request acknowledge
Symbol
SDRAM *
/CKE*
*
/
/
/*
/*
/
/
*
*
I/O
Output
Output
Output
Output
Output
Output
Output
Input
Input
Output
Function
Strobe signal indicating that area 4 is
selected, DRAM row address strobe signal
when area 4 is DRAM interface space, or
write enable signal of the synchronous
DRAM when the synchronous DRAM
interface is selected.
Strobe signal indicating that area 5 is
selected, DRAM row address strobe signal
when area 5 is DRAM interface space, or
dedicated clock signal for the synchronous
DRAM when the synchronous DRAM
interface is selected.
Strobe signal indicating that area 6 is
selected.
Strobe signal indicating that area 7 is
selected.
16-bit DRAM interface space upper column
address strobe signal, 8-bit DRAM interface
space column address strobe signal, upper
data mask signal of 16-bit synchronous
DRAM interface space, or data mask signal
of 8-bit synchronous DRAM interface
space.
16-bit DRAM interface space lower column
address strobe signal or lower data mask
signal for the 16-bit synchronous DRAM
interface space.
Output enable signal for the DRAM
interface space or clock enable signal for
the synchronous DRAM interface space.
Wait request signal when accessing
external space.
Request signal for release of bus to
external bus master.
Acknowledge signal indicating that bus has
been released to external bus master.