Z8F0113 datasheet(53/245 Pages) ZILOG

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PS024315-1011

P R E L I M I N A R Y

Direct LED Drive

Z8 Encore! XP® F0823 Series

Product Specification

Direct LED Drive

The Port C pins provide a current sinked output capable of driving an LED without requir-

ing an external resistor. The output sinks current at programmable levels of 3mA, 7mA,

13mA, and 20mA. This mode is enabled through the LED control registers. The LED

Drive Enable (LEDEN) register turns on the drivers. The LED Drive Level (LEDLVLH

and LEDLVLL) registers select the sink current.

Port C4

PC0

Reserved

AFS1[0]: 0

ANA4/CINP

ADC or Comparator Input

AFS1[0]: 1

PC1

Reserved

AFS1[1]: 0

ANA5/CINN

ADC or Comparator Input

AFS1[1]: 1

PC2

Reserved

AFS1[2]: 0

ANA6/VREF

ADC Analog Input or ADC Voltage Refer-

ence

AFS1[2]: 1

PC3

COUT

Comparator Output

AFS1[3]: 0

Reserved

AFS1[3]: 1

PC4

Reserved

AFS1[4]: 0

AFS1[4]: 1

PC5

Reserved

AFS1[5]: 0

AFS1[5]: 1

PC6

Reserved

AFS1[6]: 0

AFS1[6]: 1

PC7

Reserved

AFS1[7]: 0

AFS1[7]: 1

Table 17. Port Alternate Function Mapping (Non 8-Pin Parts) (Continued)

Port

Mnemonic

Alternate Function Description

Alternate Function

Set Register AFS1

Notes:

1. Because there is only a single alternate function for each Port A pin, the Alternate Function Set registers are not

implemented for Port A. Enabling alternate function selections as described in the Port A–C Alternate Function

Subregisters section on page 43 automatically enables the associated alternate function.

2. Whether PA0/PA6 take on the timer input or timer output complement function depends on the timer configura-

tion as described in the Timer Pin Signal Operation section on page 83.

3. Because there are at most two choices of alternate function for any pin of Port B, the Alternate Function Set reg-

ister AFS2 is implemented but not used to select the function. Also, alternate function selection as described in

the Port A–C Alternate Function Subregisters section on page 43 must also be enabled.

4. VREF is available on PB5 in 28-pin products only.

5. Because there are at most two choices of alternate function for any pin of Port C, the Alternate Function Set reg-

ister AFS2 is implemented but not used to select the function. Also, Alternate Function selection as described in

the Port A–C Alternate Function Subregisters section on page 43 must also be enabled.

6. VREF is available on PC2 in 20-pin parts only.

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