AT90S2313-4PI Atmel, AT90S2313-4PI Datasheet - Page 47

• Manufacturer Part Number: AT90S2313-4PI
• Description: IC MCU 2K 4MHZ UART LV IT 20DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-4PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• 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): 2.7 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: -

Baud Rate Generator
0839I–AVR–06/02
• Bit 1 – RXB8: Receive Data Bit 8
When CHR9 is set (one), RXB8 is the ninth data bit of the received character.
• Bit 0 – TXB8: Transmit Data Bit 8
When CHR9 is set (one), TXB8 is the ninth data bit in the character to be transmitted.
The baud rate generator is a frequency divider that generates baud rates according to
the following equation:
•
•
•
For standard crystal frequencies, the most commonly used baud rates can be generated
by using the UBRR settings in Table 15. UBRR values that yield an actual baud rate dif-
fering less than 2% from the target baud rate, are boldfaced in the table. However, using
baud rates that have more than 1% error is not recommended. High error ratings give
less noise resistance.
Table 15. UBRR Settings at Various Crystal Frequencies
Baud Rate
Baud Rate 3.2768 MHz %Error
Baud Rate 7.3728 MHz %Error
BAUD = Baud Rate
f
UBRR = Contents of the UART Baud Rate Register (UBRR) (0 - 255)
CK
115200 UBRR=
115200 UBRR=
115200 UBRR=
14400 UBRR=
19200 UBRR=
28800 UBRR=
38400 UBRR=
57600 UBRR=
76800 UBRR=
14400 UBRR=
19200 UBRR=
28800 UBRR=
38400 UBRR=
57600 UBRR=
76800 UBRR=
14400 UBRR=
19200 UBRR=
28800 UBRR=
38400 UBRR=
57600 UBRR=
76800 UBRR=
2400 UBRR=
4800 UBRR=
9600 UBRR=
2400 UBRR=
4800 UBRR=
9600 UBRR=
2400 UBRR=
4800 UBRR=
9600 UBRR=
= Crystal Clock frequency
1 MHz %Error
191
25
12
84
42
20
13
10
95
47
31
23
15
11
6
3
2
1
1
0
0
0
6
4
3
2
1
7
5
3
22.9 UBRR=
22.9 UBRR=
84.3 UBRR=
12.5 UBRR=
12.5 UBRR=
12.5 UBRR=
0.2 UBRR=
0.2 UBRR=
7.5 UBRR=
7.8 UBRR=
7.8 UBRR=
7.8 UBRR=
7.8 UBRR=
0.4 UBRR=
0.8 UBRR=
1.6 UBRR=
1.6 UBRR=
3.1 UBRR=
1.6 UBRR=
6.3 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
1.8432 MHz %Error
3.6864 MHz %Error
BAUD
8 MHz %Error
207
103
=
47
23
11
95
47
23
15
11
51
34
25
16
12
7
5
3
2
1
1
0
7
5
3
2
1
8
6
3
------------------------------------ -
16(UBRR
33.3 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.2 UBRR=
0.2 UBRR=
0.2 UBRR=
0.8 UBRR=
0.2 UBRR=
2.1 UBRR=
0.2 UBRR=
3.7 UBRR=
7.5 UBRR=
7.8 UBRR=
f
CK
9.216 MHz %Error
+
1)
2 MHz %Error
4 MHz %Error
103
239
119
51
25
12
51
25
16
12
59
39
29
19
14
8
6
3
2
1
1
0
8
6
3
2
1
9
7
4
22.9 UBRR=
0.2 UBRR=
0.2 UBRR=
0.2 UBRR=
3.7 UBRR=
7.5 UBRR=
7.8 UBRR=
7.8 UBRR=
7.8 UBRR=
7.8 UBRR=
0.2 UBRR=
0.2 UBRR=
0.2 UBRR=
2.1 UBRR=
0.2 UBRR=
3.7 UBRR=
7.5 UBRR=
7.8 UBRR=
7.8 UBRR=
7.8 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
0.0 UBRR=
6.7 UBRR=
0.0 UBRR=
AT90S2313
2.4576 MHz %Error
11.059 MHz %Error
4.608 MHz %Error
119
287
143
63
31
15
10
59
29
19
14
71
47
35
23
17
11
7
4
3
2
1
0
9
7
4
3
2
8
5
12.5
25.0
20.0
-
0.0
0.0
0.0
3.1
0.0
6.3
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
6.7
0.0
6.7
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
47