MC68HC08JK1 Datasheet, PDF (42/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Configuration Register (CONFIG)
5.3 Functional Description
The configuration register is used in the initialization of various options.
The configuration register can be written once after each reset. All of the
configuration register bits are cleared during reset. Since the various
options affect the operation of the MCU it is recommended that this
register be written immediately after reset. The configuration register is
located at $001E and $001F, and may be read at anytime.
NOTE:
The CONFIG registers are one-time writable by the user after each
reset. Upon a reset, the CONFIG registers default to predetermined
settings as shown in Figure 5-1 and Figure 5-2.
Address: $001E
Bit 7
6
5
4
3
2
1
Bit 0
Read:
IRQPUD R
R
LVIT1 LVIT0
R
R
R
Write:
Reset: 0
0
0
Not affected Not affected
0
0
0
POR: 0
0
0
0
0
0
0
0
R = Reserved
Figure 5-1. Configuration Register 2 (CONFIG2)
IRQPUD — IRQ1 Pin Pull-up control bit
1 = Internal Pull-up is disconnected
0 = Internal Pull-up is connected between IRQ1 pin and V_DD
LVIT1, LVIT0 — Low Voltage Inhibit trip voltage selection bits
Detail description of the LVI control signals is given in Section 16.
Technical Data
42
Configuration Register (CONFIG)
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MC68H(R)C08JL3 — Rev. 4
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