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CHAPTER 25 PWC TIMER (ONLY MB90485 SERIES)
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Pin related to PWC timer
The pin related to the PWC timer has 3ch of PWC0/PWC1/PWC2 and functions as the input
port when the PWC is used. The PWC0/PWC1/PWC2 pins function as the general-purpose I/O
port (P36/PWC0,
P37/PWC1,P75/PWC2) and input pin.
● Setting when using as PWC0/PWC1/PWC2 pins
When the PWC0/PWC1/PWC2 are used as input by the PWC timer, the P36/PWC0,P37/PWC1,
P75/PWC2 pins should be set to the input port by the port direction register (DDR3→bit14,
15→"0" DDR7 bit13→"0").
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Block diagram of pin related to PWC timer
Standby control : Stop mode (SPL=1), timebase timer mode (SPL=1), watch mode (SPL=1)
518
Figure25.2-2 Block diagram of pin related to PWC timer
Peripheral
function input
Port data register (PDR)
PDR Read
Output latch
PDR Write
Port direction register
(DDR)
Direction latch
DDR Write
DDR Read
Peripheral function output
(MT00, MT01)
(EXTC)
Peripheral function output enable
Standby control (SPL=1)
Open drain control signal
(P43/P44/P45 only)
P-ch
Pin
N-ch
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