Samsung SCX-1100 Service Manual page 90

3-7 THUNDERBOLT ASIC DESCRIPTION
3-7-1 ENTIRE DESCRIPTION
THUNDERBOLT ASIC is configured with SERIAL INTERFACE INPUT PORT interfacing Main controller, 2 DC-DC Converter
Controllers, Power On Reset Generation Circuit, and Motor drive part.
3-7-2 THUNDERBOLT FUNCTION DESCRIPTION
3-7-2-1 SERIAL INTERFACE INPUT PORT
To MAIN CONTROLLER(S3C46MOX(Jupiter3)), /TBCS,TBCLK,TBDO are connected with MAIN CONTROLLER (S3C46MOX
(Jupiter3)), and see the figure for Timing.
Tcs-sclk
/ TBCS
TBCLK
bit 1
TBDO
LSB
Parameter Description
Fclk Serial clock frequency
Tclh SCLK high width
Tcll SCLK low width
Tcs-sclk Delay nCS falling to first SCLK rising
Tsclk-cs Delay last SCLK rising edge to nCS rising
Tdsu Data valid to SCLK set up time
Tdhd Data hold time
Trd SDI rise time
Tfd SDI fall time
Trc SCLK rise time
Tfc SCLK fall time
Samsung Electronics
Tdsu
bit 2 bit 3 bit 4 bit 5 bit 6
time
< Figure 21. SERIAL INTERFACE INPUT Timing Diagram >
< Figure 21-1. SERIAL INTERFACE INPUT Timing Specification >
- This Document can not be used without Samsung's authorization -
Data Latcked on the rising edge of SCLK
Tdhd
bit 7 bit 8 bit 9 bit 10 bit 11 bit 12 bit 13
Min Typ
2.5
125 200
125 200
250 800
250 400
125 200
125 200
5
5
5
5
CIRCUIT DESCRIPTION
Tcs-sclk
SDI stays at
last value
MSB
Max Units
4 MHz
- nsec
- nsec
- nsec
- nsec
- nsec
- nsec
20 nsec
20 nsec
20 nsec
20 nsec
Repair Manual
3-31