MC68HC908QY2CDW Datasheet, PDF (22/184 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
1.5 Pin Functions
Table 1-2 provides a description of the pin functions.
Table 1-2. Pin Functions
Pin
Name
Description
V_DD
Power supply
V_SS
Power supply ground
PTA0 — General purpose I/O port
PTA0
AD0 — A/D channel 0 input
TCH0 — Timer Channel 0 I/O
KBI0 — Keyboard interrupt input 0
PTA1 — General purpose I/O port
PTA1
AD1 — A/D channel 1 input
TCH1 — Timer Channel 1 I/O
KBI1 — Keyboard interrupt input 1
PTA2 — General purpose input-only port
PTA2
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
PTA3
RST — Reset input, active low with internal pullup and Schmitt trigger
KBI3 — Keyboard interrupt input 3
PTA4 — General purpose I/O port
PTA4
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
PTA5
OSC1 — XTAL, RC, or external oscillator input
AD3 — A/D channel 3 input
KBI5 — Keyboard interrupt input 5
PTB[0:7]^{(1) 8 general-purpose I/O ports}
1. The PTB pins are not available on the 8-pin packages (see note in 12.1 Introduction).
Input/Output
Power
Power
Input/Output
Input
Input/Output
Input
Input/Output
Input
Input/Output
Input
Input
Input
Input
Input
Input/Output
Input
Input
Input/Output
Output
Output
Input
Input
Input/Output
Input
Input
Input
Input/Output
MC68HC908QY/QT Family Data Sheet, Rev. 6
22
Freescale Semiconductor