MB89935B データシートの表示（PDF） - Fujitsu

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MB89935B

8-bit Proprietary Microcontroller

Fujitsu 

MB89930A Series

(7) UART, Serial I/O Timing

(VCC = 5.0 V ± 10%, AVSS = VSS = 0.0 V, Ta = −40 °C to +85 °C)

Parameter

Symbol Pin name Condition

Value

Min

Max

Unit Remarks

Serial clock cycle time

tSCYC

UCK/SCK

2 tINST*



µs

UCK/SCK ↓ → SO time

Valid SI → UCK/SCK↑

tSLOV UCK/SCK, SO Internal shift −200

200 ns

tIVSH UCK/SCK, SI clock mode 1/2 tINST*



µs

UCK/SCK ↑ → Valid SI hold time tSHIX UCK/SCK, SI

1/2 tINST*



µs

Serial clock “H” pulse width

tSHSL

UCK/SCK

tINST*



µs

Serial clock “L” pulse width

UCK/SCK ↓ → SO time

Valid SI → UCK/SCK

tSLSH

UCK/SCK

External

tINST*



µs

tSLOV UCK/SCK, SO shift clock

0

200 ns

tIVSH UCK/SCK, SI

mode

1/2 tINST*



µs

UCK/SCK ↑ → Valid SI hold time tSHIX UCK/SCK, SI

1/2 tINST*



µs

* : For information on tinst, see “ (4) Instruction Cycle”.

• Internal Shift Clock Mode

UCK/SCK

SO

SI

tSCYC

0.8 V

2.4 V

tSLOV

2.4 V

0.8 V

tIVSH

tSHIX

0.8 VCC 0.8 VCC

0.2 VCC 0.2 VCC

0.8 V

• External Shift Clock Mode

UCK/SCK

0.2 VCC

SO

SI

tSLSH

tSHSL

0.2 VCC

0.8 VCC

tSLOV

2.4 V

0.8 V

tIVSH

tSHIX

0.8 VCC 0.8 VCC

0.2 VCC 0.2 VCC

0.8 VCC

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