MC908JB16DWE Datasheet, PDF (38/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
Summary of the pin functions are provided in Table 1-1.
Table 1-1. Summary of Pin Functions
PIN NAME
PIN DESCRIPTION
V_DD
V_SS
V_REG
RST
IRQ
Power supply.
Power supply ground.
3.3V regulated output from MCU.
Reset input, active low.
With internal pull-up and schmitt trigger input.
External IRQ pin; with programmable internal pull-up and
schmitt trigger input.
Used for mode entry selection.
OSC1
Crystal oscillator input.
OSC2
Crystal oscillator output; inverting of OSC1 signal.
V_DDA(1)
V_SSA0(1)
V_SSA1(1)
V_REGA0(1)
V_REGA1(1)
CGMXFC1⁽¹⁾
Analog power supply.
Analog power supply ground.
3.3V regulated output from MCU.
3.3V input for CGM2.
CGM1 external filter capacitor connection.
CGMXFC2⁽¹⁾
CGMOUT1⁽¹⁾
CGMOUT2⁽¹⁾
CGM2 external filter capacitor connection.
CGM1 clock output.
CGM2 clock output.
PTA0/KBA0
:
PTA7/KBA7
8-bit general purpose I/O port.
Pins as keyboard interrupts, KBA0–KBA7.
Each pin has programmable internal pullup when configured
as input.
IN/OUT
IN
OUT
OUT
IN/OUT
IN
IN
IN
OUT
IN
OUT
OUT
IN
OUT
OUT
OUT
OUT
IN/OUT
IN
IN
VOLTAGE
LEVEL
4.0 to 5.5V
0V
V_REG (3.3V)
V_DD
V_DD
V_REG to V_TST
V_REG
V_REG
4.0 to 5.5V
0V
V_REGA0 (3.3V)
V_REGA0
V_REGA0
V_REGA0
V_REGA0
V_REGA0
V_DD
V_DD
V_DD
Technical Data
38
General Description
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor