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CHAPTER 16 8-/16-BIT PPG TIMER
16.3.4 PPG Reload Registers (PRLLC/PRLHC, PRLLD/PRLHD)
The value (reload value) from which the PPG down counter starts counting is set in the
PPG reload registers, which are an 8-bit register at Low level and an 8-bit register at
High level.
This section explains the function of PRLLC/PRLHC and PRLLD/PRLHD only. The
PRLLE/PRLHE, PRLLF/PRLHF have the same function as the PRLLC/PRLHC, and the 8-/
16-bit PPG timers E, F are set.
■ PPG Reload Registers (PRLLC/PRLHC, PRLLD/PRLHD)
Figure 16.3-5 PPG Reload Registers (PRLLC/PRLHC, PRLLD/PRLHD)
Table 16.3-5 indicates the functions of the PPG reload registers.
Notes:
• In the 16-bit PPG output operation mode (PPGCD: MD1, MD0="11
B
"), use a long-word instruction to
set the PPG reload registers or the word instruction to set the PPGC and PPGD in this order.
• In the 8 + 8-bit PPG output operation mode (PPGCD: MD1, MD0="01
B
"), set the same value in both the
Low-level and High-level PPG reload registers (PRLLC/PRLHC) of the 8-/16-bit PPG timer C. Setting a
different value in the Low-level and High-level PPG reload registers may cause the 8-/16-bit PPG timer D
to have different PPG output waveforms at each clock cycle.
R/W R/WR/WR/WR/W R/WR/WR/W
D11 D8D9D10D15 D12D13D14
R/W R/WR/WR/WR/W R/WR/WR/W
D3 D0D1D2D7 D4D5D6
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
XXXXXXXX
B
XXXXXXXX
B
Address:
chC PRLHC 007919
H
chD PRLHD 00791B
H
Other channel:
chE PRLHE 00791D
H
chF PRLHF 00791F
H
Address:
chC PRLLC 007918
H
chD PRLLD 00791A
H
Other channel:
chE PRLLE 00791C
H
chF PRLLF 00791E
H
R/W : Read/Write
✕
: Undefined
Reset value
Reset value
Table 16.3-5 Functions of PPG Reload Registers
Function 8-/16-bit PPG Timer C 8-/16-bit PPG Timer D
Retains reload value on Low-level side PRLLC PRLLD
Retains reload value on High-level side PRLHC PRLHD