GMS84512 Datasheet, PDF (58/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
8
8
PWM8H
76543210
Wpwm8L
6
PWM8L
- - 543210
5
PWMCR2
- - - 43210
Data BUS
8
PWMCR1
76543210
14
CNTB
CNTB
PS2
14-bit Data Register
14
14-bit Comparator
14
14-bit Counter
Match
POL1
EN8
PWM8
FIG. 3.6.2 Block Diagram of 14-bit PWM
3.6.1 PWM8 (14-bit PWM )
When the PWM8 is used for output, first set the higher 8-bit of the PWM8H register, then the lower 6-bit of
the PWM6 register. The 14-bit data of PWM8 can be compare with the 14-bit comparator after lower 6-bit
data of PWM8 is transferred.
Data setting for PWM8(14-bit PWM)
l The PWM output pulse period is consist with 64(=2⁶) high level area which is consist with 256(=2⁸)low-
level area. First, the basic pulse is made by the data of PWM8H, then the position of pulse as long as
low level width(0.5uS) among 64 short pulse is determined by contents of PWM8L.
TABLE 3.6.1
BIT
Bit0 = “1”
Bit1 = “1”
Bit2 = “1”
Bit3 = “1”
Bit4 = “1”
Bit5 = “1”
Sub-Frame(short pulse) position as long as low level area
Pulse
S32,
1
S16, S48
2
S8 , S24, S40, S56
4
S4 , S12, S20, S28, S36, S44, S52, S60
8
S2 , S6 , S10, S14, S18, S22, S26, S30, S34, S38, S42, S46, S50, S54, S58,
16
S62
S1 , S3 , S5 , S7, S9, S11, S13, S15, S17, S19, S21, S23, S25, S27, S29, S31, 32
S33, S35, S37, S39, S41, S43, S45, S47, S49, S51, S53, S55, S57, S59, S61,
S63
3 - 33