msm7630 Oki Semiconductor, msm7630 Datasheet - Page 84

• Manufacturer Part Number: msm7630
• Description: Universal Speech Processor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
3.2 TCR: Timer Value Register
This register provides the counter’s current value. It will be undefined after reset.
Timer Unit
1. Features
The timer unit (TMR) is a 16-bit programmable timer. It has two modes: an interval timer mode
which requests interrupts to the CPU core, and a clock division mode which generates a 50% duty,
frequency divided clock.
2. TMR Functions
2.1 Counter
• 16-bit up counter
2.2 Counter Clock Period
• F (SCP operating frequency ¥ 1)
• 4F (SCP operating frequency ¥ 4)
• 16F (SCP operating frequency ¥ 16)
• 64F (SCP operating frequency ¥ 64)
2.3 Interval Timer Interrupts
When the counter overflows (counter value changes from 0xFFFF to 0x0000), it will request an
interrupt to the CPU core.
2.4 Divided Clock Generation
When the counter overflows (counter value changes from 0xFFFF to 0x0000), it will invert the value
currently being output.
3. TMR Registers
3.1 TIR: Timer Initial Value Register
This register saves the counter’s initial value. When this register is written, the same value will be
written to the Timer Value Register (TCR). This register will be undefined after reset.
bit
bit
15
15
TCR
TIR
0
0
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