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CHAPTER 16 8-/16-BIT PPG TIMER
Table 16.3-2 Functions of PPGC Operation Mode Control Register (PPGCC)
Bit Name Function
bit7 PEN0:
PPG0 operation enable bit
This bit enables or disables the count operation of the 8-/16-bit PPG timer
C.
When set to "0": Count operation disabled
When set to "1": Count operation enabled
• When the count operation is disabled (PEN0=0), and the pulse output
is enabled (PE0=1), the output is held at a Low level.
bit6 Undefined bit Read: The value is undefined.
Write: No effect
bit5 PE0:
PPG0 pin output enable bit
This bit switches between PPGC pin functions and enables or disables the
pulse output.
When set to "0": PPGC pin functions as general-purpose I/O port. The
pulse output is disabled.
When set to "1": PPGC pin functions as PPGC output pin. The pulse
output is enabled.
bit4 PIE0:
Underflow interrupt enable
bit
This bit enables or disables an interrupt.
When set to "0": No interrupt request generated even at underflow
(PUF0 = 1).
When set to "1": Interrupt request generated at underflow (PUF0 = 1)
bit3 PUF0:
Underflow generation flag
bit
8-bit PPG output 2-channel independent operation mode, 8+8-bit
PPG output operation mode:
When the value of the PPGC down counter is decremented from
"00
H
" to"FF
H
", an underflow occurs (PUF0 = 1).
16-bit PPG output operation mode:
When the values of the PPGC and PPGD down counters are decremented
from "0000
H
" to "FFFF
H
", an underflow occurs (PUF0 = 1).
• When an underflow occurs (PUF0 = 1) with an underflow interrupt
enabled (PIE0 = 1), an interrupt request is generated.
When set to "0": Clears counter
When set to "1": No effect
Read by read modify write instructions: 1 is read.
bit2
bit1
Undefined bits Write: No effect
Read: The value is undefined.
bit0 Reserved: Reserved bit Always set this bit to 1.