MC68HC908QY4A_10 Datasheet, PDF (19/200 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

1.5 Pin Functions
Table 1-2 provides a description of the pin functions.
Table 1-2. Pin Functions
Pin
Name
V_DD
V_SS
PTA0
PTA1
PTA2
PTA3
PTA4
PTA5
PTB0⁽¹⁾
PTB1⁽¹⁾
PTB2-
PTB7⁽¹⁾
Description
Power supply
Power supply ground
PTA0 — General purpose I/O port
TCH0 — Timer Channel 0 I/O
AD0 — A/D channel 0 input
KBI0 — Keyboard interrupt input 0
PTA1 — General purpose I/O port
TCH1 — Timer Channel 1 I/O
AD1 — A/D channel 1 input
KBI1 — Keyboard interrupt input 1
PTA2 — General purpose input-only port
IRQ — External interrupt with programmable pullup and Schmitt trigger input
KBI2 — Keyboard interrupt input 2
TCLK — Timer clock input
PTA3 — General purpose I/O port
RST — Reset input, active low with internal pullup and Schmitt trigger
KBI3 — Keyboard interrupt input 3
PTA4 — General purpose I/O port
OSC2 —XTAL oscillator output (XTAL option only)
RC or internal oscillator output (OSC2EN = 1 in PTAPUE register)
AD2 — A/D channel 2 input
KBI4 — Keyboard interrupt input 4
PTA5 — General purpose I/O port
OSC1 — XTAL, RC, or external oscillator input
AD3 — A/D channel 3 input
KBI5 — Keyboard interrupt input 5
PTB0 — General-purpose I/O port
AD4 — A/D channel 4 input
PTB1 — General-purpose I/O port
AD5 — A/D channel 5 input
6 General-purpose I/O port
1. The PTB pins are not available on the 8-pin packages.
Pin Functions
Input/Output
Power
Power
Input/Output
Input/Output
Input
Input
Input/Output
Input/Output
Input
Input
Input
Input
Input
Input
Input/Output
Input
Input
Input/Output
Output
Output
Input
Input
Input/Output
Input
Input
Input
Input/Output
Input
Input/Output
Input
Input/Output
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
Freescale Semiconductor
19