EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 321
![no-image](/images/no-image-200.jpg)
EZ80F91MCU
Manufacturer Part Number
EZ80F91MCU
Description
eZ80Acclaim-TM Flash Microcontrollers
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.EZ80F91MCU.pdf
(396 pages)
- Current page: 321 of 396
- Download datasheet (5Mb)
PS019209-0504
Table 192. ZDI Read/Write Control Register Functions*
(ZDI_RW_CTL = 16h in the ZDI Register Write Only Address Space) (Continued)
ZDI Bus Control Register
The ZDI Bus Control register controls bus requests during DEBUG mode. It
enables or disables bus acknowledge in ZDI DEBUG mode and allows ZDI to
force assertion of the BUSACK signal. This register should only be written during
ZDI Debug mode (that is, following a break). See Table 193.
Table 193. ZDI Bus Control Register
(ZDI_BUS_CTL = 17h in the ZDI Register Write Only Address Space)
Hex
Value
09
0A
0B
Note: *The CPU’s alternate register set (A’, F’, B’, C’, D’, E’, HL’) cannot be read directly. The ZDI
Bit
Reset
CPU Access
Note: W = Write Only.
Bit
Position
7
ZDI_BUSAK_EN
programmer must execute the exchange instruction (EXX) to gain access to the alternate
CPU register set.
Command
Reset ADL
ADL
Exchange CPU register sets
AF
BC
DE
HL
Read memory from current
PC value, increment PC
AF’
HL’
Value
0
1
BC’
DE’
0
W
P R E L I M I N A R Y
7
0
Description
Bus requests by external peripherals using the BUSREQ
pin are ignored. The bus acknowledge signal, BUSACK,
is not asserted in response to any bus requests.
Bus requests by external peripherals using the BUSREQ
pin are accepted. A bus acknowledge occurs at the end of
the current ZDI operation. The bus acknowledge is
indicated by asserting the BUSACK pin in response to a
bus request.
W
6
0
W
5
0
Hex
Value
89
8A
8B
W
4
0
Command
Reserved
Reserved
Write memory from current PC
value, increment PC
W
3
0
Product Specification
W
ZiLOG Debug Interface
2
0
eZ80F91 MCU
W
1
0
W
0
0
302
Related parts for EZ80F91MCU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![EZ80L920210ZCO](/images/manufacturer_photos/0/7/729/zilog_tmb.jpg)
Part Number:
Description:
KIT DEV EZ80 WEB SERVER
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ020SC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ050SC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ020EC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ050EC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80190AZ050SC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80190AZ050EC00TR](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ020SG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ050SG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80190AZ050SG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 8 BIT 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ050EG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80190AZ050EG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 50MHZ XTEMP 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80L92AZ020EG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80F93AZ020SG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet:
![EZ80F93AZ020EG](/photos/6/76/67664/269-100-lqfp_tmb.jpg)
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet: