Custom Engineering MT002-1, Руководство пользователя

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4.5 Switching characteristics of circuit
The switching characteristic summarized in the following table :
ITEM SYMBOL MIN. TYP. MAX. UNIT CONDITIONS
Clock frequency fCLK
- 5 8
MHz
VDD= 5.0V
- 3 5 VDD = 3.3V
Clock width tw CLK 95 (155) - - ns
VDD= 5.0V, fCLK = 5MHz
VDD= 3.3V, fCLK = 3MHz
Data set-up time t setup DI 100 (140) - - ns
Data hold time t hold DI 85 - - ns
Data out delay time td DO
- 50 -
ns
VDD= 5.0V
- 90 - VDD = 3.3V
Latch width tw LAT 150 - - ns
Latch set-up time t setup LAT 200 - - ns
Latch Hold time t hold LAT 80 - - ns
STB set-up time t setup STB 300 - - ns
Driver out delay time tdo - - 10 (30) μ s VDD= 5.0V (VDD= 3.3V)
NOTES: CLK should be used at duty 50% (± 5%), if operated more than fCLK = 5MHz (or fCLK = 3MHz when
VDD = 3.3 V). Also, CLK should be within one cycle , being subject to the ratio between DATA SET-UP TIME
and DATA HOLD TIME is 1:1.
4.6 Timing chart
CLOCK (CLK)
LATCH (LAT)
High : HOLD
Low : THROUGH
DRIVER OUT
STROBE (STB)
DATA OUT (DO)
High: BLACK
Low: WHITE
DATA IN (DI)
High: BLACK
Low: WHITE
Tw CLK
td DO
t setup DI t hold DI
tw LAT
tdo tdo
t setup STB
t setup LAT t hold LAT
NOTES: The symbol “ ────── “ means a negative logical signal.
4. PRINT HEAD
4-4 MT002-1
User Manual