AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 115

• Manufacturer Part Number: AT89LP51ED2-20MU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 256 B
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: VQFN-44
• Mounting Style: SMD/SMT
• Data Rom Size: 4 KB
• Interface Type: 2-Wire, SPI, UART
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

Table 17-6.
3714A–MICRO–7/11
BRL Address = 09AH
Not Bit Addressable
Bit
Symbol
BRL
7-0
7
Function
Baud Rate Reload Value
Holds the 8-bit reload value of the Internal Baud Rate Generator. This value is loaded into the BRG when the BRG
overflows from FFH to 00H.
BRL – Baud Rate Reload Register
Figure 17-1. Internal Baud Rate Generator
Table 17-5.
6
Baud Rate
115200
57600
38400
28800
19200
9600
4800
4800
2400
1200
600
CLK
SYS
5
Commonly Used Baud Rates Generated by BRG
X2
1
1
1
1
1
1
1
0
0
0
0
÷6
(BDRCON.1)
4
SMOD1
AT89LP51RD2/ED2/ID2 Preliminary
SPD
0
1
1
1
1
1
1
1
1
0
0
0
0
(BDRCON.4)
BRR
SPD
3
1
1
1
1
1
1
1
0
0
0
0
f
BRL
BRG
BRL
OSC
247
238
229
220
203
149
247
238
220
185
43
2
= 16.384 MHz
Overflow
Error (%)
1.23
1.23
1.23
1.23
0.63
0.31
1.23
1.23
1.23
1.23
0.16
Reset Value = 0000 0000B
÷6
1
(PCON.7)
SMOD1
0
1
BRL
243
230
217
204
178
100
243
230
202
152
–
f
OSC
UART
= 24 MHz
0
Error (%)
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
3.55
0.16
–
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