MC908AP32CFBE Datasheet, PDF (25/324 Pages) Freescale Semiconductor, Inc – The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location.

1.5 Pin Functions
Description of the pin functions are provided in Table 1-2.
Table 1-2. Pin Functions
PIN NAME
PIN DESCRIPTION
V_DD
V_SS
V_DDA
V_SSA
V_REFH
V_REFL
V_REG
RST
IRQ1
OSC1
OSC2
CGMXFC
PTA0/ADC0
:
PTA7/ADC7
Power supply.
Power supply ground.
Power supply for analog circuits.
Power supply ground for analog circuits.
ADC input reference high.
ADC input reference low.
Internal (2.5V) regulator output.
Require external capacitors for decoupling.
Reset input, active low; with internal pullup and schmitt
trigger input.
External IRQ1 pin; with internal pullup and schmitt trigger
input.
Used for mode entry selection.
Crystal or RC oscillator input.
Crystal OSC option: crystal oscillator output; inverted
OSC1.
RC OSC option: bus clock output.
Internal OSC option: bus clock output.
CGM external filter capacitor connection.
8-bit general purpose I/O port.
Pins as ADC inputs, ADC0–ADC7.
Each pin has high current sink for LED.
Pin Functions
IN/OUT
In
Out
In
Out
In
Out
Out
In
In
In
In
Out
Out
Out
In/Out
In/Out
In
Out
VOLTAGE
LEVEL
4.5 to 5.5
or
2.7 to 3.3
0V
V_DD
V_SS
V_DDA
V_SSA
2.5 V⁽¹⁾
V_DD
V_DD
V_DD to V_TST
V_REG
V_REG
V_REG
V_REG
Analog
V_DD
V_REFH
V_DD
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor
25