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參數資料
| 型號： | 935261615112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | 7.50 MM, PLASTIC, SO-28 |
| 文件頁數： | 17/48頁 |
| 文件大小： | 356K |
| 代理商： | 935261615112 |
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1998 Oct 06
24
Philips Semiconductors
Preliminary specication
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
UDA1321
Table 7
No digital I/O communication
Notes
1. The input pins must have a pull-up resistor.
2. Connect/disconnect: holds the USB ‘disconnected’ as long as the initialization is not finished.
3. Alarm mute: input to switch the sound off; specially used if the USB host program does not respond to the control.This
pin acts directly on the sound and passes the mute to the USB host.
4. Standby is switched on (output becomes LOW) after a programmable time if mute is active (see Byte 18 of Table 6).
5. Mute is switched on (output becomes LOW) after a programmable time if the isochronous data flow is interrupted
(see Byte 17 of Table 6).
6. For selection between HID/LED application see configuration map byte 11 (output is active HIGH).
Table 8
4-pins digital I/O communication
Notes
1. Connect/disconnect: holds the USB ‘disconnected’ as long as the initialization is not finished.
2. Alarm mute: input to switch the sound off; specially used if the USB host program does not respond to the control.
This pin acts directly on the sound and passes the mute to the USB host.
PIN
INPUT/OUTPUT
FUNCTION 1
FUNCTION 2
GP5
output; not programmable; note 2
connect/disconnect
GP4
inputs; programmable; note 1
alarm mute; note 3
HID input 3
GP3
HID input 2
GP0
HID input 1
GP2
outputs; programmable
standby; note 4
HID/LED output 2; note 6
GP1
mute; note 5
HID/LED output 1; note 6
PIN
INPUT/OUTPUT
FUNCTION 1
FUNCTION 2
GP5
output; not programmable; note 1
connect/disconnect
GP4
digital I/O-bus
BCKO
GP3
WSO
GP2
DO
GP1
DI
GP0
input; programmable
HID input 1
alarm mute; note 2
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