ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 96

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

Table 30. Chip Select x Bus Mode Control Register (CS0_BMC = 00F0h, CS1_BMC =
PS027001-0707
00F1h, CS2_BMC = 00F2h, CS3_BMC = 00F3h)
Bit
CS0_BMC Reset
CS1_BMC Reset
CS2_BMC Reset
CS3_BMC Reset
CPU Access
Note: R/W = Read/Write; R = Read Only.
Bit
Position
[7:6]
BUS_MODE
5
AD_MUX
4
Chip Select x Bus Mode Control Register
The Chip Select Bus Mode register (see
Z80, Intel™, or Motorola bus modes. Changing the bus mode allows the eZ80F91 device
to interface to peripherals based on the Z80, Intel™, or Motorola style asynchronous bus
interfaces. When a bus mode other than eZ80 is programmed for a particular chip select,
the CSx_WAIT setting in that Chip Select Control Register is ignored.
Value Description
00
01
10
11
0
1
0
R/W
eZ80
Z80 bus mode
Intel™ bus mode
Motorola bus mode
Separate address and data
Multiplexed address and data—appears on data bus
DATA[7:0]
Reserved
7
0
0
0
0
bus mode
R/W
6
0
0
0
0
R/W
5
0
0
0
0
R
4
0
0
0
0
Table
R/W
3
0
0
0
0
30) configures the chip select for eZ80,
R/W
2
0
0
0
0
R/W
1
1
1
1
1
Chip Selects and Wait States
Product Specification
R/W
0
0
0
0
0
eZ80F91 ASSP
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