Freescale Semiconductor ColdFire MCF52210 - Manual (Page 349)

General Purpose Timer Module (GPT)
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 21-11
21.6.11 GPT System Control Register 2 (GPTSCR2)
Table 21-13. GPTIE Field Descriptions
Field Description
7–4 Reserved, should be cleared.
3–0
Cnl
Channel interrupt enable. Enables the C[3:0]F flags in GPT flag register 1 to generate interrupt requests for each
channel. These bits are read anytime, write anytime.
1 Corresponding channel interrupt requests enabled
0 Corresponding channel interrupt requests disabled
IPSBAR
Offset: 0x1A_000D (GPTSCR2)
Access: Supervisor read/write
7 6 5 4 3 2 1 0
R
TOI
0
PUPT RDPT TCRE PR
W
Reset: 0 0 0 0 0 0 0 0
Figure 21-13. GPT System Control Register 2 (GPTSCR2)
Table 21-14. GPTSCR2 Field Descriptions
Field Description
7
TOI
Enables timer overflow interrupt requests.
1 Overflow interrupt requests enabled
0 Overflow interrupt requests disabled
6 Reserved, should be cleared.
5
PUPT
Enables pull-up resistors on the GPT ports when the ports are configured as inputs.
1 Pull-up resistors enabled
0 Pull-up resistors disabled
4
RDPT
GPT drive reduction. Reduces the output driver size.
1 Output drive reduction enabled
0 Output drive reduction disabled
3
TCRE
Enables a counter reset after a channel 3 compare.
1 Counter reset enabled
0 Counter reset disabled
Note: When the GPT channel 3 registers contain 0x0000 and TCRE is set, the GPT counter registers remain at
0x0000 all the time. When the GPT channel 3 registers contain 0xFFFF and TCRE is set, TOF does not get set even
though the GPT counter registers go from 0xFFFF to 0x0000.