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MC68340 bảng dữ liệu(PDF) 307 Page - Freescale Semiconductor, Inc

tên linh kiện MC68340
Giải thích chi tiết về linh kiện  Integrated Processor with DMA User?셲 Manual
PDF  441 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68340 bảng dữ liệu(HTML) 307 Page - Freescale Semiconductor, Inc

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7- 12
MC68340 USER’S MANUAL
MOTOROLA
C6, C7, C8 ARE LOST
RxD
RECEIVER
ENABLED
RxRDY
(SR0)
FFULL
(SR1)
RxRDYA
OVERRUN
(SR4)
RTS
1
STATUS DATA
STATUS DATA
STATUS DATA
CS
RESET BY COMMAND
OPR(0) = 1
C4
C3
C5
C6
C7
C8
C1
C2
NOTES:
1. Timing shown for MR1(7) = 1
2. Timing shown for OPCR(4) = 1 and MR1(6) = 0
3. R = Read
4. C = Received Character
N
R
R
R
R R
R R
R
C1
C2
C3
C4
C5
LOST
STATUS DATA
Figure 7-6. Receiver Timing Diagram
The receiver detects the beginning of a break in the middle of a character if the break
persists through the next character time. When the break begins in the middle of a
character, the receiver places the damaged character in the receiver first-in-first-out
(FIFO) stack and sets the corresponding error conditions and RxRDY bit in the SR. Then,
if the break persists until the next character time, the receiver places an all-zero character
into the receiver FIFO and sets the corresponding RB and RxRDY bits in the SR.
7.3.2.3 FIFO STACK. The FIFO stack is used in each channel's receiver buffer logic. The
stack consists of three receiver holding registers. The receive buffer consists of the FIFO
and a receiver shift register connected to the RxDx (refer to Figure 7-4). Data is
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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