参数资料
型号: M68HC05M68H
厂商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件页数: 93/130页
文件大小: 1541K
代理商: M68HC05M68H
Mask Option Register (MOR)
Mask Option Register
MC68HC705P6A
Rev. 2.0
Advance Information
MOTOROLA
Mask Option Register (MOR)
93
SPR0 and SPR1
SIOP Clock Rate
The SPR0 and SPR1 bits determine the clock rate used to transfer the
serial data to and from the SIOP. The various clock rates available are
given in
Table 11-1
.
SWAIT
STOP Instruction Mode
Setting the SWAIT bit will prevent the STOP instruction from stopping
the on-board oscillator. Clearing the SWAIT bit will permit the STOP
instruction to stop the on-board oscillator and place the MCU in stop
mode. Executing the STOP instruction when SWAIT is set will place
the MCU in halt mode. See
3.5.1 STOP Instruction
for additional
information.
SECURE
Security State
(1)
If SECURE bit is set, the EPROM is locked.
PA(0:7)PU
Port A Pullups/Interrupt Enable/Disable
If any PA(0:7)PU is selected, that pullup/interrupt is enabled. The
interrupt sensitivity will be selected via the LEVEL bit in the same way
as the IRQ pin.
NOTE:
The port A pullup/interrupt function is
NOT
available on the ROM device,
MC68HC05P6.
Table 11-1. SIOP Clock Rate
SPR1
SPR0
SIOP Master Clock
0
0
f
osc
÷
64
0
1
f
osc
÷
32
1
0
f
osc
÷
16
1
1
f
osc
÷
8
1. No security feature is absolutely secure. However, Motorola
s strategy is to make reading or
copying the EPROM/OTPROM difficult for unauthorized users.
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