tb62719af TOSHIBA Semiconductor CORPORATION, tb62719af Datasheet - Page 21

• Manufacturer Part Number: tb62719af
• Description: 16ch Constant Current Drivers And Controller For Full-color Led Modules And Panels
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Detailed PWM 256 Grayscales Setting
Polarity of Serial Input Data for All Dot Adjustment
(PI REG [7:0]) and PWM 256 grayscales
Parallel Data Transfer Timing
PI SEL = H, Selects Data Input for All Dot Adjustment for DAC3.
PI SEL = L, Selects Data Input for PWM 256 Grayscales.
RESET
H
H
H
PI DATA [7]
PI DATA [0]
PI DATA [7]
PI DATA [0]
PI LATCH
PI LATCH
All dot adjustment
All dot adjustment
PWM pulse data
PI SEL
X
L
L
L
(3 bits)
PI REG1 [0]
PI REG2 [0]
(5 bits)
1 word (8 bits)
HHHHHHHH
HHHHHHHL
of PI REG2
LLLLLLLH
LLLLLLLL
LLLLLLLL
LSB
LSB
PI REG1 [7]
MSB
PI REG2 [7]
MSB
↑
↓
Output Pulse
255/255
100%
0/255
0/255
generator circuit
Rate
0%
0%
⎯
PWM pulse
OUT00
PO DATA [7]
PO DATA [0]
(PI REG2 [127:0], 16 × 1 word (8 bits))
Output pulse width is at its
maximum value when input
data is FF.
Outputs are OFF when the
input data is 00.
The input data can be used to
control the PWM pulse width
and hence generate 256
grayscales.
Outputs are OFF when the
input data is 00.
Early condition after the reset
signal input is set in 0/256
(output off).
(PI REG2 [127:0])
Operation and Function
21
PWM pulse data
PI REG2 [120]
LSB
PO REG2 [127]
MSB
When PI SEL = L, The PWM grayscale
controls the output pulse width.
1 word (8 bits) × 16 are transferred in
parallel.
1 word is the PWM data of each output
pulse width is set in 256 step.
PI REG2 [7:0]
PI REG2 [15:8]
PI REG2 [127:120]
Minimum output pulse width is
→ PWM data for OUT0.
→ PWM data for OUT1.
→ PWM data for OUT15.
1/PWMCLK.
generator circuit
PWM pulse
OUT15
Notes
TB62719AF
PO DATA [7]
PO DATA [0]
2004-05-12