M68HC11KA datasheet(29/68 Pages) MOTOROLA

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MC68HC11KA4

MOTOROLA

MC68HC11KA4TS/D

PSEL[4:0] — Priority Select Bits [4:0]

Can be written only while bit I in the CCR is set (interrupts disabled). These bits select one interrupt

source to be elevated above all other I-bit related sources.

CONFIG is made up of EEPROM cells and static latches. The operation of the MCU is controlled directly

by these latches and not the actual EEPROM byte. When programming the CONFIG register, the EE-

PROM byte is being accessed. When the CONFIG register is being read, the static latches are being

accessed.

These bits can be read at any time. The value read is the one latched into the register from the EE-

PROM cells during the last reset sequence. A new value programmed into this register cannot be read

until after a subsequent reset sequence. Unused bits always read as ones.

If SMOD = 1, CONFIG bits can be written at any time. If SMOD = 0 CONFIG bits can only be written

using the EEPROM programming sequence, and are neither readable nor active until latched via the

next reset.

ROMAD — ROM/EPROM Mapping Control

Refer to 2 Operating Modes and On-Chip Memory.

PSELx

Interrupt Source Promoted

43210

Reserved (Default to IRQ)

00100

Reserved (Default to IRQ)

00101

Reserved (Default to IRQ)

00110

IRQ

00111

Real-Time Interrupt

01000

Timer Input Capture 1

01001

Timer Input Capture 2

01010

Timer Input Capture 3

01011

Timer Output Compare 1

01100

Timer Output Compare 2

01101

Timer Output Compare 3

01110

Timer Output Compare 4

01111

Timer Input Capture 4/Output Compare 5

10000

Timer Overflow

10001

Pulse Accumulator Overflow

10010

Pulse Accumulator Input Edge

10011

SPI Serial Transfer Complete

10100

SCI Serial System

10101

Reserved (Default to IRQ)

10110

Reserved (Default to IRQ)

10111

Reserved (Default to IRQ)

CONFIG — COP, ROM Mapping, EEPROM Enables

$003F

Bit 7

654321

Bit 0

ROMAD

—

CLKX

PAREN

NOSEC

NOCOP

ROMON

EEON

RESET:

—

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M68HC11KA Datasheet(PDF) 29 Page - Motorola, Inc

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