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WM8945ECS/R 데이터시트(PDF) 104 Page - Wolfson Microelectronics plc

부품명 WM8945ECS/R
상세설명  Mono Low-Power CODEC with Video Buffer and Touch Panel Controller
PDF  169 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8945ECS/R 데이터시트(HTML) 104 Page - Wolfson Microelectronics plc

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WM8945
Production Data
w
PD, May 2011, Rev 4.1
104
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R17 (11h)
Status Flags
15
TEMP_STS
0
Thermal Sensor status
0 = Normal
1 = Overtemperature
R42 (2Ah)
Output ctrl
15
THERR_ACT
1
Thermal Shutdown enable
0 = Disabled
1 = Enabled
When THERR_ACT = 1, then an
overtemperature condition will
cause the speaker outputs to be
disabled.
Table 69 Thermal Shutdown Control
POWER ON RESET
The WM8945 includes a Power-On Reset (POR) circuit, which is used to reset the digital logic into a
default state after power up. The POR circuit derives its output from LDOVDD and DCVDD. The
internal POR
¯¯¯ signal is asserted low when either LDOVDD or DCVDD are below minimum thresholds.
The specific behaviour of the circuit will vary, depending on relative timing of the supply voltages.
Typical scenarios are illustrated in Figure 48 and Figure 49.
Figure 48 Power On Reset Timing – LDOVDD enabled first



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