參數(shù)資料
型號(hào): SC16C752IB48,157
廠商: NXP Semiconductors
文件頁(yè)數(shù): 6/47頁(yè)
文件大小: 0K
描述: IC DUAL UART 64BYTE 48LQFP
標(biāo)準(zhǔn)包裝: 1,250
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動(dòng)流量控制功能:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 托盤
其它名稱: 935270055157
SC16C752IB48
SC16C752IB48-ND
Philips Semiconductors
SC16C752
Dual UART with 64-byte FIFO
Product data
Rev. 04 — 20 June 2003
14 of 47
9397 750 11635
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.6 DMA operation
There are two modes of DMA operation, DMA mode 0 or DMA mode 1, selected by
FCR[3].
In DMA mode 0 or FIFO disable (FCR[0] = 0) DMA occurs in single character
transfers. In DMA mode 1, multi-character (or block) DMA transfers are managed to
relieve the processor for longer periods of time.
6.6.1
Single DMA transfers (DMA mode 0/FIFO disable)
Figure 9 shows TXRDY and RXRDY in DMA mode 0/FIFO disable.
Transmitter: When empty, the TXRDY signal becomes active. TXRDY will go inactive
after one character has been loaded into it.
Receiver: RXRDY is active when there is at least one character in the FIFO. It
becomes inactive when the receiver is empty.
Fig 9.
TXRDY and RXRDY in DMA mode 0/FIFO disable.
TX
wrptr
FIFO EMPTY
TXRDY
AT LEAST ONE
LOCATION FILLED
TXRDY
RX
rdptr
FIFO EMPTY
RXRDY
AT LEAST ONE
LOCATION FILLED
RXRDY
002aaa232
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