AN2131SC Cypress Semiconductor Corp, AN2131SC Datasheet - Page 307

• Manufacturer Part Number: AN2131SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131SC

• 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: 16
• 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: 428-1306; AN2131SC

C.2.8.3
The Timer 2 capture mode (Figure C-4.) is the same as the 16-bit timer/counter mode, with the
addition of the capture registers and control signals.
The CP/RL2 bit in the T2CON SFR enables the capture feature. When CP/RL2 = 1, a high-to-
low transition on the T2EX pin when EXEN2 = 1 causes the Timer 2 value to be loaded into
the capture registers RCAP2L and RCAP2H.
EZ-USB TRM v1.9
CLK24
T2 pin
T2EX pin
6-Bit Timer/Counter Mode with Capture
EXEN2
TR2
T2CON.0
Divide by 12
Divide by 4
Bit
Figure C-4. Timer 2 - Timer/Counter with Capture
Appendix C: 8051 Hardware Description
Table C-6. T2CON Register - SFR C8h
1
0
CP/RL2 - Capture/reload flag. When CP/RL2 = 1, Timer 2
captures occur on high-to-low transitions of the T2EX pin, if
EXEN2 = 1. When CP/RL2 = 0, auto-reloads occur when
Timer 2 overflows or when high-to-low transitions occur on
the T2EX pin, if EXEN2 = 1. If either RCLK or TCLK is set
to 1, CP/RL2 will not function and Timer 2 will operate in
auto-reload mode following each overflow.
T2M
0
1
C/ T2
CAPTURE
Function
CLK
0
0
EXF2
RCAP2L
TL2
7
7
8
8
RCAP2H
TH2
TF2
15
15
INT
C - 11