AT89C5130A-RDRUM Atmel, AT89C5130A-RDRUM Datasheet - Page 53
AT89C5130A-RDRUM
Manufacturer Part Number
AT89C5130A-RDRUM
Description
MCU 8051 16K FLASH USB 64-VQFP
Manufacturer
Atmel
Series
AT89C513xr
Datasheet
1.AT89C5130A-PUTUM.pdf
(188 pages)
Specifications of AT89C5130A-RDRUM
Core Processor
C52X2
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
LED, POR, PWM, WDT
Number Of I /o
34
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
64-TQFP, 64-VQFP
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89STK-05
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
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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
53
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