mc68hc705p6a Freescale Semiconductor, Inc, mc68hc705p6a Datasheet - Page 64

• Manufacturer Part Number: mc68hc705p6a
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Mask Option Register (MOR)
LEVEL — IRQ Edge Sensitivity
LSBF — SIOP Least Significant Bit First
SPR0 and SPR1 — SIOP Clock Rate
SWAIT — STOP Instruction Mode
SECURE — Security State
PA(0:7)PU — Port A Pullups/Interrupt Enable/Disable
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the EPROM/OTPROM
64
difficult for unauthorized users.
If the LEVEL bit is clear, the IRQ/V
to the IRQ/V
the input signal and the logic low level of the input signal on the IRQ/V
If the LSBF bit is set, the serial data to and from the SIOP will be transferred least significant bit first.
If the LSBF bit is clear, the serial data to and from the SIOP will be transferred most significant bit first.
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
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
3.4.1 STOP Instruction
If SECURE bit is set, the EPROM is locked.
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.
The port A pullup/interrupt function is NOT available on the ROM device,
MC68HC05P6.
PP
pin. If the LEVEL bit is set, the IRQ/V
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
for additional information.
(1)
SPR1
0
0
1
1
Table 11-1. SIOP Clock Rate
PP
pin will only be sensitive to the falling edge of the signal applied
SPR0
0
1
0
1
NOTE
SIOP Master Clock
PP
Table
pin will be sensitive to both the falling edge of
f
f
f
osc
osc
osc
f
osc
11-1.
÷ 64
÷ 32
÷ 16
÷ 8
PP
pin.
Freescale Semiconductor