sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 98
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sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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Offset 08h-0Bh
This register contains the current value of the High-Resolution Timer.
Offset 0Ch
This register supplies the High-Resolution Timer status information.
Offset 0Dh
This register enables the High-Resolution Timer interrupt; selects the Timer clock; and disables the 27 MHz internal clock during low
power states.
Offset 0Eh-0Fh
31:0
Bit
7:1
7:3
0
1
0
2
Description
Current Timer Value.
Reserved.
TMSTS (TIMER Status). This bit is set to 1 when the most significant bit (bit 31) of the timer changes from 1 to 0. It is
cleared to 0 upon system reset or when 1 is written by software to this bit.
Reserved.
TM27MPD (TIMER 27 MHz Power Down). This bit is cleared to 0 when POR# is asserted or when the GX1 module de-
asserts its internal SUSPA# signal (i.e., on SUSPA# rising edge). See Section 4.4.2.1 "Usage Hints" on page 97.
0: 27 MHz input clock is enabled.
1: 27 MHz input clock is disabled when the GX1 module asserts its internal SUSPA# signal.
TMCLKSEL (TIMER Clock Select).
0: Count-up timer uses the oscillator clock divided by 27.
1: Count-up timer uses the oscillator clock, 27 MHz clock.
TMEN (TIMER Interrupt Enable).
0: High-Resolution Timer interrupt is disabled.
1: High-Resolution Timer interrupt is enabled.
Revision 5.1
Table 4-4. High-Resolution Timer Registers
TIMER Configuration Register - TMCNFG (R/W)
TIMER Value Register - TMVALUE (RO)
TIMER Status Register - TMSTS (R/W)
Reserved - RSVD
AMD Geode™ SC3200 Processor Data Book
General Configuration Block
Reset Value: xxxxxxxxh
Reset Value: 00h
Reset Value: 00h
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