W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 177

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

6.9 Timer Registers
There are four registers included in the timer. The I/O address map is allocated from
0xf0000040 to 0xf0000043.
Two 24-bit decrementing timers will be implemented, corresponding to the TCR1, TICR1 and
TCR2, TICR2 independently. When the timer interrupt enable bit is set to one and the counter
decrements to zero, the timer will assert the associated interrupt signal. The interrupt signal
will assert one of the thirty-two external interrupts defined by the EI bits in the control register.
When a timer reaches zero, the timer hardware reloads the counter with the value from the
timer initial count register and continues decrementing.
W90221X version 0.6
Port Address
BA + 0x40
BA + 0x41
BA + 0x42
BA + 0x43
Symbol
TICR1
TICR2
TCR1
TCR2
Access
R/W
R/W
R/W
R/W
Timer Control Register 1
Timer Initial Control Register 1
Timer Control Register 2
Timer Initial Control Register 2
Description
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