CF5707CG datasheet(6/7 Pages) NPC

6 / 7 page

CF5707CG

SEIKO NPC CORPORATION —6

Test Function

Normal mode (TEST = open)

A 512Hz rectangular waveform is output on the TEST pin. Note that the load resistance is 10M

Ω or greater

and capacitance is 20pF or less. Normal watch movement waveforms are output on OUT1 and OUT2.

Test mode 1 (TEST = VDD)

The device switches to test mode 1 when the TEST pin goes HIGH (VDD). Note, however, that the TEST must

stay HIGH for 2 cycles of the 512Hz clock (TCH > 3.9ms), otherwise the input is ignored. In test mode 1, high-

speed watch movement period (TCY = 62.5ms) is selected.

Test mode 2 (TEST = VSS)

(Note. IC test mode only)

The device switches to test mode 2 when the TEST pin goes LOW (VSS). In test mode 2, operation occurs at

32-times speed. Furthermore, if an input on RESET occurs, all internal registers are cleared and circuit opera-

tion stops. Once in this condition, the circuit remains stopped until the TEST pin becomes open circuit or

HIGH level (VDD).

Test mode 1

OUT1

OUT2

TPW

TCY/2

VDD

VSS

TPW

TCY/2

VDD

VSS

tCY/2 tCY/2

TPW

< Tch

> Tch

VDD

VSS

TEST

CF5707CG 데이터시트(PDF) 6 Page - Nippon Precision Circuits Inc