mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 531

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

FRR—Free Run/Restart
ICLK—Input Clock Source for the Timer
GE—Gate Enable
16.4.2.4 TIMER REFERENCE REGISTERS. Each of the 16-bit, memory-mapped,
read/write timer reference registers (TRR1–TRR4) contain the timeout’s reference value.
REFERENCE—Reference to TCNx
This reference value is reached when the TCNx register increments to equal the TRRx
register.
TRR1–TRR4
RESET
FIELD
ADDR
R/W
BIT
0 = Free run. The timer count continues to increment after the reference value is
1 = Restart. The timer count is reset immediately after the reference value is reached.
00 = Internally cascaded input.
01 = Internal general system clock.
10 = Internal general system clock divided by 16.
11 = Corresponding TINx pin (falling edge).
0 = The TGATE1 signal is ignored.
1 = The TGATE1 signal is used to control the timer.
reached.
For TMR1, the timer 1 input is the output of timer 2.
For TMR3, the timer 3 input is the output of timer 4.
For TMR2 and TMR4, this selection means no input clock is provided to the timer.
0
1
(IMMR & 0xFFFF0000) + 0x994 (TRR1), 0x996 (TRR2), 0x9A4 (TRR3), 0x9A6 (TRR4)
2
Freescale Semiconductor, Inc.
For More Information On This Product,
3
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
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REFERENCE
7
R/W
1
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Communication Processor Module
10
11
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