UPD16337 datasheet(5/16 Pages) NEC

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µPD16337

TRUTH TABLE 1 (Shift Register Block)

Input

Output

Shift Register

R/L

CLK

↓

Input

OutputNote 1

Right shift execution

H or L

Output

Hold

↓

OutputNote 2

Input

Left shift execution

H or L

Output

Hold

Notes 1. The data of S57, S58, S59, S60 shifts to S61, S62, S63, S64 and is output from B1, B2, B3, B4 at the falling

edge of the clock, respectively.

2. The data of S5, S6, S7, S8 shifts to S1, S2, S3, S4 and is output from A1, A2, A3, A4 at the falling edge of

the clock, respectively.

TRUTH TABLE 2 (Latch Block)

CLK

Output State of Latch Block (Ln)

↑

Latch Sn data and hold output data

↓

Hold latch data

TRUTH TABLE 3 (Driver Block)

BLK

Output State of Driver Block

H (All driver outputs: H)

L (All driver outputs: L)

Output latch data (Ln)

Output reversed latch data (Ln)

×: H or L, H: High level, L: Low level

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