參數(shù)資料
型號: U3810BM
英文描述: Multi Standard Feature Phone Integrated Circuit
中文描述: 多標(biāo)準(zhǔn)功能手機(jī)集成電路
文件頁數(shù): 24/31頁
文件大?。?/td> 497K
代理商: U3810BM
TELEFUNKEN Semiconductors
U3810BM
Rev. A1: 19.01.1996
24 (31)
Power-on-reset and reset pin
The system (U3810BM + microcontroller) is woken up by
an initial condition:
– line voltage
(VL)
– ringer
(THA)
– external supply
(ESI)
To avoid undefined states of the system when it is powered
on, an internal reset clears the internal registers, and
maintains pin RESET low during trt.
1.) Power on in speed-up condition (VDD < VSON)
LINE
LVIO
SHUTDOWN
VDD
CO
RESETN
937609
Figure 11
2.) Power on without speed-up (VDD > VSON)
LINE
LVIO
SHUTDOWN
VDD
CO
RESETN
937610
Figure 12
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