MC68HC908LB8_05 Datasheet, PDF (60/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Configuration Register (CONFIG)
Address: $001E
Bit 7
6
5
Read:
IRQPUD IRQEN
R
Write:
Reset: 0
0
0
POR: 0
0
0
= Unimplemented
4
3
2
1
0
0
OSCOPT1 OSCOPT0
0
0
0
0
0
0
0
0
R = Reserved U = Unaffected
Figure 5-1. Configuration Register 2 (CONFIG2)
IRQPUD — IRQ Pin Pullup Control Bit
1 = Internal pullup is disconnected
0 = Internal pullup is connected between pin IRQ and V_DD
IRQEN — IRQ Pin Function Selection Bit
1 = Interrupt request function active in pin
0 = Interrupt request function inactive in pin
OSCOPT1 and OSCPOT0 — Selection Bits for Oscillator Option
OSCOPT[1:0]
00
01
10
11
Oscillator Selection
Internal oscillator
External oscillator
External RC oscillator
External XTAL oscillator
Bit 0
RSTEN
U
0
RSTEN — RST Pin Function Selection
1 = Reset function active in pin
0 = Reset function inactive in pin
NOTE
The RSTEN bit is cleared by a power-on reset (POR) only. Other resets will
leave this bit unaffected.
MC68HC908LB8 Data Sheet, Rev. 1
60
Freescale Semiconductor