參數(shù)資料
型號(hào): EP9301-CQ
廠商: Cirrus Logic Inc
文件頁(yè)數(shù): 1/5頁(yè)
文件大?。?/td> 0K
描述: IC ARM920T MCU 166MHZ 208-LQFP
標(biāo)準(zhǔn)包裝: 36
系列: EP9
核心處理器: ARM9
芯體尺寸: 16/32-位
速度: 166MHz
連通性: EBI/EMI,以太網(wǎng),I²C,IrDA,SPI,UART/USART,USB
外圍設(shè)備: AC'97,DMA,I²S,LED,MaverickKey,POR,PWM,WDT
輸入/輸出數(shù): 19
程序存儲(chǔ)器類型: ROMless
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 5x12b
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 208-LQFP
包裝: 托盤
其它名稱: 598-1248
Copyright
Cirrus Logic, Inc. 2007
(All Rights Reserved)
Cirrus Logic, Inc.
Errata: EP9301 - Silicon Revision: E2
Reference EP9301 Data Sheet revision DS636PP5 dated March 2005.
Determining the Silicon Revision of the Integrated Circuit
On the front of the integrated circuit, directly under the part number, is an alpha-numeric line. Characters 5
and 6 in this line represent the silicon revision of the chip. For example, this line indicates that the chip is a
“E2” revision chip:
EFWAE2AM0340
This Errata is applicable only to the E2 revision of the chip.
Please refer to AN273, “EP93xx Rev E Design Guidelines” (Cirrus Logic document AN273REV3) for
additional information.
AC’97
Description
Disabling audio transmit by clearing the TEN bit in one of the AC97TXCRx registers will not clear out any
remaining bytes in the TX FIFO. If the number of bytes left in the FIFO is not equal to a whole sample or
samples, this will throw off subsequent audio playback causing distortion or channel swapping.
Workaround
To stop audio playback, do the following:
1) Pause DMA
2) Poll the AC97SRx register until either TXUE or TXFE is set.
3) Clear the TEN bit.
This ensures that the TX FIFO is empty before the transmit channel is disabled.
APR ‘07
ER636E2
B
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