Hitachi H8/3637 Hardware Manual page 344

SDRL—Serial data register L
Bit
SDRL7
Initial value Undefined
Read/Write R/W
PWCR—PWM control register
Bit
Initial value
Read/Write
PWDRU—PWM data register U
Bit
Initial value
Read/Write
7 6
SDRL6 SDRL5
Undefined Undefined
R/W R/W
Stores transmit and receive data
8-bit transfer mode:
16-bit transfer mode:
7 6
— — —
1 1
— — —
7 6
— — PWDRU5
1 1
— — W
5 4 3
SDRL4 SDRL3
Undefined Undefined
R/W R/W
5 4 3
— —
1 1 1
— —
Clock select
0 Input clock ø/2 (tø* = 2/ø). 1 conversion cycle =
16,384ø; minimum transition width = 1/ø
1 Input clock ø/4 (tø* = 4/ø). 1 conversion cycle = 1
32,768ø; minimum transition width = 2/ø
Note: * tø: PWM input clock cycle
5 4 3
PWDRU4 PWDRU3
0 0 0
W W
Upper 6 bits of PWM waveform generation data
H'A3
2 1
SDRL2 SDRL1
Undefined Undefined
R/W R/W
8-bit data
Lower 8 bits of data
H'A4
2 1
— —
1 1
— —
H'A5
2 1
PWDRU2 PWDRU1
0 0
W W
SCI1
0
SDRL0
Undefined
R/W
14-bit PWM
0
PWCR0
0
W
14-bit PWM
0
PWDRU0
0
W
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