AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 322
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AN2136SC
Manufacturer Part Number
AN2136SC
Description
IC MCU 8051 8K RAM 24MHZ 44QFP
Manufacturer
Cypress Semiconductor Corp
Series
EZ-USB®r
Datasheet
1.AN2131SC.pdf
(334 pages)
Specifications of AN2136SC
Applications
USB Microcontroller
Core Processor
8051
Program Memory Type
ROMless
Controller Series
AN213x
Ram Size
8K x 8
Interface
I²C, USB
Number Of I /o
8
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
428-1309
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C.3.5 Mode 3
Mode 3 provides asynchronous, full-duplex communication, using a total of 11 bits: 1 start
bit, 8 data bits, a programmable 9th bit, and 1 stop bit. The data bits are transmitted and
received LSB first.
The mode 3 transmit and operations are identical to mode 2. The mode 3 baud rate generation
is identical to mode 1. That is, mode 3 is a combination of mode 2 protocol and mode 1 baud
rate. Figure C-15.illustrates the mode 3 transmit timing. Figure C-16.illustrates the mode 3
receive timing.
Mode 3 operation is identical to that of the standard 8051 when Timers 1 and 2 use CLK24/12
(the default).
C - 26
Bit detector
RXD0OUT
RXD0OUT
sampling
TX CLK
Write to
RX CLK
SBUF0
SHIFT
RXD0
SHIFT
TXD0
RXD0
TXD0
RI_0
TI_0
RI_0
TI_0
Figure C-15. Serial Port 0 Mode 3 Transmit Timing
Figure C-16. Serial Port 0 Mode 3 Receive Timing
START
START
Appendix C: 8051 Hardware Description
D0
D0
D1
D1
D2
D2
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
RB8
TB8
EZ-USB TRM v1.9
STOP
STOP
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