VRS51C1100-40-Q Cypress Semiconductor, VRS51C1100-40-Q Datasheet - Page 37

• 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

Example of PWM Timing Diagram
F
If Fosc = 20MHz, PDCK[1:0] of PWMC = #03H, then PWM clock = 20MHz/2^4 = 20MHz/16 = 1.25MHz. PWM output
cycle frame frequency = (20MHz/2^4)/32 = 39.1 kHz.
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IGURE
VRS51C1100
22: PWM T
16
1st Cycle
MOV PWMD0 #83H
MOV PWME, #08H
frame
IMING
32T
D
IAGRAM
1T
(Narrow pulse inserted by NP0[2:0]=3)
PWM clock= 1/T= Fosc / 2^(PDIV+1)
The SPWM output cycle frame frequency = SPWM clock/32 = [Fosc/2^(PDIV+1)]/32
2nd Cycle
frame
32T
; PWMD04:0]=10h (=16T high, 16T low), NP02:0] = 3
; Enable P1.3 as PWM output pin
16
3rd Cycle
frame
32T
1T
4th Cycle
frame
32T
5th Cycle
16
frame
32T
1T
6th Cycle
frame
32T
7th Cycle
16
frame
32T
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16
8th Cycle
frame
32T