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

Part # CF5707CG
Description  Analog Watch Stepping Motor Driver
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

CF5707CG Datasheet(HTML) 6 Page - Nippon Precision Circuits Inc

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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
T
< Tch
T
> Tch
VDD
VSS
TEST


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