Intel 8XC196MD ユーザーズマニュアル
11-5
EVENT PROCESSOR ARRAY (EPA)
11.3 TIMER/COUNTER FUNCTIONAL OVERVIEW
The EPA has two 16-bit up/down timer/counters, timer 1 and timer 2, which can be clocked in-
ternally or externally. Each is called a timer if it is clocked internally and a counter if it is clocked
externally. Figure 11-2 illustrates the timer/counter structure.
ternally or externally. Each is called a timer if it is clocked internally and a counter if it is clocked
externally. Figure 11-2 illustrates the timer/counter structure.
PI_MASK
1FBCH
1FBCH
1FBCH
Peripheral Interrupt Mask
The bits in this register enable and disable (mask)
the timer 1 and 2 overflow/underflow interrupt
requests, the waveform generator interrupt request
(MC, MD), the EPA compare-only channel 5
interrupt request ( MD), and the serial port error
interrupts (MH).
the timer 1 and 2 overflow/underflow interrupt
requests, the waveform generator interrupt request
(MC, MD), the EPA compare-only channel 5
interrupt request ( MD), and the serial port error
interrupts (MH).
PI_PEND
1FBEH
1FBEH
1FBEH
Peripheral Interrupt Pending
Any bit set indicates a pending interrupt request.
T1CONTROL
1F78H
1F78H
1F78H
Timer 1 Control
This register enables/disables timer 1, controls
whether it counts up or down, selects the clock
source and direction, and determines the clock
prescaler setting.
whether it counts up or down, selects the clock
source and direction, and determines the clock
prescaler setting.
T1RELOAD
1F72H
1F72H
1F72H
Timer 1 Reload
This register contains an initialization value for
timer 1. A timer 1 overflow or underflows loads the
T1RELOAD value into the TIMER1 register if both
quadrature clocking and the reload function are
enabled (T1CONTROL.5:0 = 1).
timer 1. A timer 1 overflow or underflows loads the
T1RELOAD value into the TIMER1 register if both
quadrature clocking and the reload function are
enabled (T1CONTROL.5:0 = 1).
T2CONTROL
1F7CH
1F7CH
1F7CH
Timer 2 Control
This register enables/disables timer 2, controls
whether it counts up or down, selects the clock
source and direction, and determines the clock
prescaler setting.
whether it counts up or down, selects the clock
source and direction, and determines the clock
prescaler setting.
TIMER1
1F7AH
1F7AH
1F7AH
Timer 1 Value
This register contains the current value of timer 1.
TIMER2
1F7EH
1F7EH
1F7EH
Timer 2 Value
This register contains the current value of timer 2.
Table 11-3. EPA Control and Status Registers (Continued)
Mnemonic
Address
Description
MC
MD
MH