VRS51C1100-40-Q Cypress Semiconductor, VRS51C1100-40-Q Datasheet - Page 26

• Manufacturer Part Number: VRS51C1100-40-Q
• Description: 8-bit Microcontrollers - MCU 128K+1K 40MHz 5V
• Manufacturer: Cypress Semiconductor

Specifications of VRS51C1100-40-Q

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 1 KB
• Operating Supply Voltage: 4.5 V to 5.5 V
• Package / Case: QFP-44
• Mounting Style: SMD/SMT
• Data Rom Size: 128 B
• Interface Type: UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Program Memory Type: Flash
• Factory Pack Quantity: 96
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V

In Mode 2, the baud rate is programmable to either
1/32 or 1/64 the oscillator frequency.
F
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SMOD
Fosc/2
IGURE
Write to
VRS51C1100
SBUF
÷2
0 1
19: S
RXD
1-0 Transition
Sample
Detector
ERIAL
÷16
1
P
ORT
S
D
CLK
Start
Detector
LOAD SBUF
Stop
Start
TX Clock
÷16
M
Bit
Q
ODE
RX Clock
Control
2 B
ZERO DETECTOR
LOCK
TX Control Unit
RX Control Unit
Internal Bus
D
TI
RI
Internal Bus
IAGRAM
SBUF
SBUF
9-Bit Shift Register
Shift
Serial Port
Interrupt
Shift
Send
Data
SBUF
SHIFT
READ SBUF
Load
TXD
UART Operation in Mode 3
In Mode 3, 11 bits are transmitted (through TXD) or
received
composed of: a Start bit (low), 8 data bits (LSB first), a
programmable 9
Mode 3 is identical to Mode 2 in all respects but one,
the baud rate. Either Timer 1 or Timer 2 generates the
baud rate in Mode 3.
F
SMOD
RCLK
IGURE
Timer 1
Overflow
÷2
0 1
Write to
0
0
20: S
SBUF
Timer 2
Overflow
1
1
RXD
TCLK
1-0 Transition
ERIAL
SAMPLE
Detector
(through
÷16
P
1
ORT
S
D
M
CLK
RX Clock
Start
Detector
th
LOAD SBUF
÷16
ODE
Start
TX Clock
Bit
Q
data bit and a Stop bit (high).
3 B
Shift
ZERO DETECTOR
RXD).
LOCK
TX Control Unit
RX Control Unit
Internal Bus
D
TI
RI
Internal Bus
IAGRAM
SBUF
SBUF
9-Bit Shift Register
The
Serial Port
Interrupt
Shift
Send
Data
SBUF
SHIFT
READ SBUF
Load
transactions
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are
TXD