14.3 Registers and Register Details
14.3.4 Reload register (PRLL/PRLH )
Reload register H
Address: ch0 000041H
ch1 000043H
Read/write
Initial value
Reload register L
Address: ch0 000040H
ch1 000042H
Read/write
Initial value
These are 8-bit registers that hold the reload values for the PCNT down counter. Their roles are described
below.
Register name
These registers are readable and writable.
Note: In 8-bit prescaler + 8-bit PPG mode, setting different values in PRLL and PRLH of
ch1 may cause the PPG waveform of ch1 to vary in each cycle. Write the same
value to PRLL and PRLH of ch0.
200
Chapter 14: 8/16-Bit PPG
15
(R/W)
(R/W)
(X)
(X)
7
(R/W) (R/W)
(X)
(X)
PRLL
Holds the L side reload value.
PRLH
Holds the H side reload value.
14
13
12
11
(R/W)
(R/W)
(R/W)
(R/W)
(X)
(X)
(X)
(X)
6
5
4
3
(R/W)
(R/W)
(R/W)
(R/W)
(X)
(X)
(X)
(X)
Function
10
9
8
PRLH
(R/W)
(R/W)
(X)
(X)
2
1
0
PRLL
(R/W)
(R/W)
(X)
(X)
MB90580 Series
Bit No.
Bit No.