AT89C5130A-PUTUM Atmel, AT89C5130A-PUTUM Datasheet - Page 53

• Manufacturer Part Number: AT89C5130A-PUTUM
• Description: IC 8051 MCU FLASH 16K USB 32QFN
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5130A-PUTUM

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: LED, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Package: 32QFN EP
• Device Core: 8051
• Family Name: 89C
• Maximum Speed: 48 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 34
• Interface Type: SPI/TWI/UART/USB
• Number Of Timers: 3
• Processor Series: AT89x
• Core: 8051
• Data Ram Size: 1.25 KB
• Maximum Clock Frequency: 48 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89STK-05
• Minimum Operating Temperature: - 40 C
• Height: 0.95 mm
• Length: 7 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 7 mm
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: AT89C5130A-PUTIM; AT89C5130A-PUTIM

13. Timer 2
13.1
4337K–USB–04/08
Auto-reload Mode
The Timer 2 in the AT89C5130A/31A-M is the standard C52 Timer 2. It is a 16-bit timer/counter:
the count is maintained by two cascaded eight-bit timer registers, TH2 and TL2. It is controlled
by T2CON (Table 13-1) and T2MOD (Table 13-2) registers. Timer 2 operation is similar to Timer
0 and Timer 1. C/T2 selects F
the timer clock input. Setting TR2 allows TL2 to be incremented by the selected input.
Timer 2 has 3 operating modes: capture, auto reload and Baud Rate Generator. These modes
are selected by the combination of RCLK, TCLK and CP/RL2 (T2CON).
Refer to the Atmel 8-bit microcontroller hardware documentation for the description of Capture
and Baud Rate Generator Modes.
Timer 2 includes the following enhancements:
The Auto-reload mode configures Timer 2 as a 16-bit timer or event counter with automatic
reload. If DCEN bit in T2MOD is cleared, Timer 2 behaves as in 80C52 (refer to the Atmel 8-bit
microcontroller hardware description). If DCEN bit is set, Timer 2 acts as an Up/down
timer/counter as shown in
When T2EX is high, Timer 2 counts up. Timer overflow occurs at FFFFh which sets the TF2 flag
and generates an interrupt request. The overflow also causes the 16-bit value in RCAP2H and
RCAP2L registers to be loaded into the timer registers TH2 and TL2.
When T2EX is low, Timer 2 counts down. Timer underflow occurs when the count in the timer
registers TH2 and TL2 equals the value stored in RCAP2H and RCAP2L registers. The under-
flow sets TF2 flag and reloads FFFFh into the timer registers.
The EXF2 bit toggles when Timer 2 overflows or underflows according to the direction of the
count. EXF2 does not generate any interrupt. This bit can be used to provide 17-bit resolution.
• Auto-reload mode with up or down counter
• Programmable Clock-output
Figure
OSC
13-1. In this mode the T2EX pin controls the direction of count.
/12 (timer operation) or external pin T2 (counter operation) as
AT89C5130A/31A-M
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