z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 58

• Manufacturer Part Number: z8f1601
• Description: Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
• Manufacturer: ZiLOG Semiconductor

Table 17. Port A-H Output Control Sub-Registers
PS017609-0803
RESET
FIELD
ADDR
BITS
R/W
POC7
R/W
7
0
AF[7:0]—Port Alternate Function enabled
0 = The port pin is in normal mode and the DDx bit in the Port A-H Data Direction sub-
register determines the direction of the pin.
1 = The alternate function is selected. Port pin operation is controlled by the alternate
function.
Port A-H Output Control Sub-Registers
The Port A-H Output Control sub-register (Table 17) is accessed through the Port A-H
Control register by writing
Port A-H Output Control sub-registers to 1 configures the specified port pins for open-
drain operation. These sub-registers affect the pins directly and, as a result, alternate func-
tions are also affected.
POC[7:0]—Port Output Control
These bits function independently of the alternate function bit and disables the drains if set
to 1.
0 = The drains are enabled for any output mode.
1 = The drain of the associated pin is disabled (open-drain mode).
If 03H in Port A-H Address Register, accessible via Port A-H Control Register
POC6
R/W
6
0
POC5
R/W
5
0
03H
to the Port A-H Address register. Setting the bits in the
POC4
R/W
4
0
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
POC3
R/W
3
0
POC2
R/W
2
0
General-Purpose I/O
POC1
R/W
1
0
Z8 Encore!
POC0
R/W
0
0
®
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