MC9S08JM60_09 Datasheet, PDF (76/388 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 5 Resets, Interrupts, and System Configuration
5.7.5 System Options Register 2 (SOPT2)
7
6
5
4
3
2
R
0
0
0
COPCLKS¹ COPW¹
SPI1FE
W
Reset
0
0
0
0
0
1
= Unimplemented or Reserved
1 _{This bit can be written only one time after reset. Additional writes are ignored.}
Figure 5-6. System Options Register 2 (SOPT2)
1
SPI2FE
1
0
ACIC
0
Table 5-7. SOPT2 Register Field Descriptions
Field
Description
7
COP Watchdog Clock Select — This write-once bit selects the clock source of the COP watchdog.
COPCLKS 0 Internal 1 kHz LPO clock is source to COP.
1 Bus clock is source to COP.
6
COPW
COP Window — This write-once bit selects the COP operation mode. When set, the 0x55-0xAA write sequence
to the SRS register must occur in the last 25% of the selected period. Any write to the SRS register during the
first 75% of the selected period will reset the MCU.
0 Normal COP operation.
1 Window COP operation.
2
SPI1FE
SPI1 Ports Input Filter Enable
0 Disable input filter on SPI1 port pins to allow for higher maximum SPI baud rate.
1 Enable input filter on SPI1 port pins to eliminate noise and restrict maximum SPI baud rate.
1
SPI2FE
SPI2 Ports Input Filter Enable
0 Disable input filter on SPI2 port pins to allow for higher maximum SPI baud rate.
1 Enable input filter on SPI2 port pins to eliminate noise and restrict maximum SPI baud rate.
0
ACIC
Analog Comparator to Input Capture Enable— This bit connects the output of ACMP to TPM input channel 0.
0 ACMP output not connected to TPM input channel 0.
1 ACMP output connected to TPM input channel 0.
5.7.6 System Device Identification Register (SDIDH, SDIDL)
This read-only register is included so host development systems can identify the HCS08 derivative and
revision number. This allows the development software to recognize where specific memory blocks,
registers, and control bits are located in a target MCU.
7
6
5
4
3
2
1
0
R
ID11
ID10
ID9
ID8
W
Reset
—
—
—
—
0
0
0
0
= Unimplemented or Reserved
Figure 5-7. System Device Identification Register — High (SDIDH)
MC9S08JM60 Series Data Sheet, Rev. 3
76
Freescale Semiconductor