AT90S2313-10PI Atmel, AT90S2313-10PI Datasheet - Page 48

• Manufacturer Part Number: AT90S2313-10PI
• Description: IC MCU 2K 10MHZ UART IT 20DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-10PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

UART Baud Rate Register –
UBRR
Analog Comparator
Analog Comparator Control
and Status Register – ACSR
48
AT90S2313
The UBRR Register is an 8-bit read/write register that specifies the UART Baud Rate
according to the formula on the previous page.
The Analog Comparator compares the input values on the positive input AIN0 (PB0) and
the negative input PB1(AIN1). When the voltage on the positive input PB0 (AIN0) is
higher than the voltage on the negative input PB1 (AIN1), the Analog Comparator Out-
put, ACO is set (one). The comparator’s output can be set to trigger the Timer/Counter1
Input Capture function. In addition, the comparator can trigger a separate interrupt
exclusive to the Analog Comparator. The user can select interrupt triggering on compar-
ator output rise, fall or toggle. A block diagram of the comparator and its surrounding
logic is shown in Figure 37.
Figure 37. Analog Comparator Block Diagram
• Bit 7 – ACD: Analog Comparator Disable
When this bit is set (one), the power to the Analog Comparator is switched off. This bit
can be set at any time to turn off the Analog Comparator. This will reduce power con-
sumption in active and Idle modes. When changing the ACD bit, the Analog Comparator
Interrupt must be disabled by clearing the ACIE bit in ACSR. Otherwise an interrupt can
occur when the bit is changed.
• Bit 6 – Res: Reserved Bit
This bit is a reserved bit in the AT90S2313 and will always read as zero.
Bit
$09 ($29)
Read/Write
Initial value
Bit
$08 ($28)
Read/Write
Initial value
MSB
ACD
R/W
R/W
7
0
7
0
R/W
R
6
0
6
–
0
ACO
R/W
N/A
5
0
5
R
R/W
R/W
ACI
4
0
4
0
ACIE
R/W
R/W
3
0
3
0
ACIC
R/W
R/W
2
0
2
0
ACIS1
R/W
R/W
1
0
1
0
ACIS0
LSB
R/W
R/W
0
0
0
0
0839I–AVR–06/02
UBRR
ACSR