PT6355-LQ 데이터 시트보기 (PDF) - Princeton Technology

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PT6355-LQ

VFD Driver/Controller IC

Princeton Technology 

PT6355

TIMING REQUIRMENTS

(Unless otherwise specified, VCC = 5 V, Ta = -20 to +85℃)

Parameter

Symbol

Reset input “L” pulse width

tw (/RESET)

Main clock input cycle time

(OSC1 input)

tc (OSC1)

Main clock input “H” pulse width

(OSC1 Input)

twH (OSC1)

Min.

2

192

60

Typ.

Main clock input “L” pulse width

(OSC1 Input)

twL (OSC1)

60

Serial clock input cycle timeNote2

tc (SCLK)

5

Serial clock input “H” pulse widthNote2

twH (SCLK)

2

Serial clock input “L” pulse widthNote2

twL (SCLK)

3

Serial input set-up timeNote2

tsu (SIN-SCLK)

2

Serial input hold timeNote2

th (SCLK-SIN)

3

Serial input set-up time

tsu (/CS)

50tc (OSC1)

Serial input hold time

th (/CS)

50tc (OSC1)

Serial clock interval time

trec (SCLK)

50tc (OSC1)

Notes:

1. tc (OSC1) = 1/fosc

2. The unit means the number of Noise Filter Sampling Clock [2 x tc (OSC1)]

3. Test Mode Frequency Measurement (refer to diagram):

a. fosc= 2 x Frequency Value outputted by the CS Pin.

b. twH (SCLK) = [(1/fosc) x 2] x 2

c. twL (SCLK) = [(1/fosc) x 2 ] x 3

d. trec (SCLK) = [50 x (1/fosc)]

e. twH (SCLK), twL (SCLK) & trec (SCLK) are very important factors in writing the PT6355 software program.

Max.

Unit

µs

ns

ns

ns

CLKs

CLKs

CLKs

CLKs

CLKs

ns

ns

ns

V1.6

16

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