Z87001 Datasheet, PDF (39/51 Pages) Zilog, Inc. – ROMless Spread Spectrum Cordless Phone Controller

Zilog
Z87001/Z87L01
ROMless Spread Spectrum Cordless Phone Controller
Table 17. Bank 3 Register Description
GPIO0DATA
Bank 3
EXT5
Field
Bit Position
R/W Data
Description
1
DATA0
fedcba9876543210
Access to Port 0 data
R XXXXh Reads pin values
W XXXXh Writes output pin values
Notes:
DATA0. The read value returns the actual pin values and does not depend on the pin directions
(i.e. for output pins, the output value is returned unless a contention occurs).
GPIO1DIR
Field
DIRECTION1
Table 18. Bank 3 Register Description
Bank 3
Bit Position
fedcba9876543210
EXT6
R/W
R/W
Data
Description
Independent control of Port 1 pin direction
..0. Pin in input mode
..1. Pin in output mode
Table 19. Bank 3 Register Description
GPIO1DATA
Field
Bank 3
Bit Position
EXT7
R/W Data
Description
DATA1
fedcba9876543210
Access to Port 1 data
R XXXXh Reads pin values
W XXXXh Writes output pin values
Notes:
DATA1. The read value returns the actual pin values and does not depend on the pin directions
(i.e. for output pins, the output value is returned unless a contention occurs)
DS96WRL0800
PRELIMINARY
39