MC68HC908QB8 Datasheet, PDF (21/236 Pages) Freescale Semiconductor, Inc – To provide the most up-to-date information, the revision of our documents

Pin
Name
V_DD
V_SS
PTA0
PTA1
PTA2
PTA3
PTA4
PTA5
PTB0
PTB1
PTB2
PTB3
Table 1-2. Pin Functions
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
SPSCK — SPI serial clock
AD4 — A/D channel 4 input
PTB1 — General-purpose I/O port
MOSI — SPI Master out Slave in
AD5 — A/D channel 5 input
PTB2 — General-purpose I/O port
MISO — SPI Master in Slave out
AD6 — A/D channel 6 input
PTB3 — General-purpose I/O port
SS — SPI slave select
AD7 — A/D channel 7 input
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/Output
Input
Input/Output
Input/Output
Input
Input/Output
Input/Output
Input
Input/Output
Input
Input
— Continued on next page
MC68HC908QB8 Data Sheet, Rev. 1
Freescale Semiconductor
21