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參數(shù)資料
| 型號： | UDA1321 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | USB-Digital To Analog Converters(通用串行總線-數(shù)模轉換器) |
| 中文描述： | 0.055 MHz, MICROCONTROLLER, PDIP32 |
| 文件頁數(shù)： | 24/44頁 |
| 文件大?。?/td> | 280K |
| 代理商： | UDA1321 |
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1998 Oct 06
24
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
UDA1321
Table 7
No digital I/O communication
Notes
1.
2.
3.
The input pins must have a pull-up resistor.
Connect/disconnect: holds the USB ‘disconnected’ as long as the initialization is not finished.
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.
Standby is switched on (output becomes LOW) after a programmable time if mute is active (see Byte 18 of Table 6).
Mute is switched on (output becomes LOW) after a programmable time if the isochronous data flow is interrupted
(see Byte 17 of Table 6).
For selection between HID/LED application see configuration map byte 11 (output is active HIGH).
4.
5.
6.
Table 8
4-pins digital I/O communication
Notes
1.
2.
Connect/disconnect: holds the USB ‘disconnected’ as long as the initialization is not finished.
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
GP4
GP3
GP0
GP2
GP1
output; not programmable; note 2
inputs; programmable; note 1
connect/disconnect
alarm mute; note 3
HID input 2
HID input 1
standby; note 4
mute; note 5
connect/disconnect
HID input 3
HID input 2
HID input 1
HID/LED output 2; note 6
HID/LED output 1; note 6
outputs; programmable
PIN
INPUT/OUTPUT
FUNCTION 1
FUNCTION 2
GP5
GP4
GP3
GP2
GP1
GP0
output; not programmable; note 1
digital I/O-bus
connect/disconnect
BCKO
WSO
DO
DI
HID input 1
connect/disconnect
BCKO
WSO
DO
DI
alarm mute; note 2
input; programmable
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