参数资料
型号: AT73C209-EK
厂商: Atmel
文件页数: 56/63页
文件大小: 0K
描述: BOARD EVAL FOR AT73C209
标准包装: 1
系列: PMAAC™
主要目的: 电源管理,专用型: 手机
已用 IC / 零件: AT73C209
已供物品: 板,CD,文档
13.2
Headset Short-Circuit Interrupt
There is one interrupt generation for Headset Short-Circuit (see diagram below). The dedicated
registers for this interrupt are 0x11 (MISC_STATUS) and 0x12 (INT_MASK). These registers
are described below. (Only the used bits for Headset Short-Circuit interrupt are described. For
more details, see Section 8.5.14 on page 23 and Section 8.5.15 on page 23 .)
Register (0x11): Miscellaneous Status (MISC_STATUS)
Register
0x11
0x12
Bit
0
0
Name
HSSHORT
HSSMSK
Description
Headset Short Flag
Headset short interrupt mask (1 to enable interrupt)
Reset Value
HSSHORT = 0
HSSMSK = 0
13.2.1
Headset Short-Circuit Sequence
Figure 13-3. Headset Short-Circuit Interrupt Diagram
Headset
Driver Output
Headset
Headset
Driver Off
Short Circuit
Headset
Driver Off
Short-Circuit on
Headset Driver
Headset
Driver Off
High
Level
High
Level
HSSMSK
HSSHORT
Time
Time
High
ITB
Time
Level
Time
Debounce
The sequence of the Head Short-Circuit Interrupt is described below.
? Put bit #0 of register 0x12 to High.
? Power on the headset output driver.
? Make a short circuit on the
→ Headset Short-Circuit Mask (HSSMSK) goes to High.
→ After Debounce Time bit #0 of register 0x11
headset output (right or left channel. (HSSHORT), goes to High Level.
→ Then ITB output goes to High Level.
The Headset Short Circuit Flag (HSSHORT) should be removed by switching off the headset
driver.
56
AT73C209
6365A–PMAAC–12-Mar-08
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