HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 64

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 2.6
Symbol
BHE/HDS*
CS
*1: Not connected
Rev. 0, 07/98, page 48 of 453
1
CP-84
6
82
Bus Interface Lines (cont)
Pin Number
FP-88
17
9
Input/
Output
Input/
output
Input/
output
Description
CPU mode 0
Bus high enable: High-order byte access signal.
Master mode
Slave mode
Reset mode
System stop
mode
CPU mode 1
*
CPU modes 2, 3
Higher data strobe: Strobe timing for the high-
order data bits.
Master mode
Slave mode
Reset mode
System stop
mode
Chip select: Selects the SCA.
CPU modes 0 3
Master mode
Reset mode
System stop
mode
Slave mode
1
Output.
Input.
Input.
Input.
Always high. Leave
unconnected, or pull up to V
Output.
Input.
Input.
Input.
Input, but ignored by the SCA.
Indicates access by a host
MPU. An internal register
read/write cycle starts when
this line is driven active low.
Input, but ignored by the SCA.
Input, but ignored by the SCA.
CC
.