AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 174

• Manufacturer Part Number: AT89C51SND2C-7FTUL
• Description: IC 8051 MCU FLASH 64K MP3 100BGA
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND2C-7FTUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
• Peripherals: Audio, I²S, MP3, PCM, POR, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b; D/A 2x20b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• Data Bus Width: 8 bit
• Data Ram Size: 2.25 KB
• Interface Type: ATAPI, I2S, IDE, SPI, UART, USB
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT89C51SND2C7FTUL

Notes:
20.4.5
174
1. These frequencies are achieved in X1 mode, F
2. These frequencies are achieved in X2 mode, F
AT8xC51SND2C/MP3B
Baud Rate Selection (Mode 2)
Table 20-2.
In mode 2, the baud rate can only be programmed to 2 fixed values: 1/16 or 1/32 of the periph-
eral clock frequency.
As shown in Figure 20-14 the selection is done using SMOD1 bit in PCON register.
Figure 20-15 gives the baud rate calculation formula depending on the selection.
Figure 20-14. Baud Rate Generator Selection (Mode 2)
115200
115200
57600
38400
19200
57600
38400
19200
Baud
Baud
9600
4800
9600
4800
Rate
Rate
SPD
SPD
1
1
1
1
1
1
1
1
1
-
-
-
CLOCK
Internal Baud Rate Generator Value
PER
F
F
SMOD
SMOD
PER
PER
1
1
1
1
1
1
1
1
1
1
1
-
-
-
= 12 MHz
= 6 MHz
BRL
BRL
246
236
217
178
243
236
217
178
100
-
-
-
PER
PER
(1)
(2)
= F
= F
Error
Error
2.34
2.34
0.16
0.16
0.16
2.34
0.16
0.16
0.16
OSC
OSC
%
%
-
-
-
÷ 2
.
÷ 2.
SPD
SPD
1
1
1
1
1
1
1
1
1
1
1
-
SMOD1
PCON.7
F
0
1
F
SMOD
SMOD
PER
PER
1
1
1
1
1
1
1
1
1
1
1
1
1
-
= 16 MHz
= 8 MHz
BRL
BRL
247
243
230
204
152
247
239
230
204
152
48
-
÷ 16
(1)
(2)
Error
Error
3.55
0.16
0.16
0.16
0.16
3.55
2.12
0.16
0.16
0.16
0.16
%
%
-
To Serial Port
SPD
SPD
1
1
1
1
1
1
1
1
1
1
1
-
F
F
SMOD
SMOD
PER
PER
1
1
1
1
1
1
1
1
1
1
1
1
0
-
= 10 MHz
= 20 MHz
4341H–MP3–10/07
BRL
BRL
245
240
223
191
126
245
234
223
191
126
126
-
(1)
(2)
Error
Error
1.36
1.73
1.36
0.16
0.16
1.36
1.36
1.36
0.16
0.16
0.16
%
%
-