Datasheet

Chapter 5 Resets, Interrupts, and General System Control
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
74 Freescale Semiconductor
5.7.4 System Options Register 2 (SOPT2)
This high page register contains bits to configure MCU specific features on the MC9S08EL32 Series and
MC9S08SL16 Series devices.
76543210
R
COPCLKS
1
1
This bit can be written only one time after reset. Additional writes are ignored.
COPW
1
0
ACIC
1
T2CH1PS
1
T2CH0PS
1
T1CH1PS
1
T1CH0PS
1
W
Reset:00000000
= Unimplemented or Reserved
Figure 5-5. System Options Register 2 (SOPT2)
Table 5-6. SOPT2 Register Field Descriptions
Field Description
7
COPCLKS
COP Watchdog Clock Select — This write-once bit selects the clock source of the COP watchdog.
0 Internal 1-kHz 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
4
ACIC
Analog Comparator to Input Capture Enable — This write-once bit connects the output of ACMP1 to TPM1
input channel 0.
0 ACMP1 output not connected to TPM1 input channel 0.
1 ACMP1 output connected to TPM1 input channel 0.
3
T2CH1PS
TPM2CH1 Pin Select— This write-once bit selects the location of the TPM2CH1 pin of the TPM2 module.
0 TPM2CH1 on PTB4.
1 TPM2CH1 on PTA7.
2
T2CH0PS
TPM2CH0 Pin Select— This write-once bit selects the location of the TPM2CH0 pin of the TPM2 module.
0 TPM2CH0 on PTA1.
1 TPM2CH0 on PTA6.
1
T1CH1PS
TPM1CH1 Pin Select— This write-once bit selects the location of the TPM1CH1 pin of the TPM1 module.
0 TPM1CH1 on PTB5.
1 TPM1CH1 on PTC1.
0
T1CH0PS
TPM1CH0 Pin Select— This write-once bit selects the location of the TPM1CH0 pin of the TPM1 module.
0 TPM1CH0 on PTA0.
1 TPM1CH0 on PTC0.