AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 16

• Manufacturer Part Number: AT89C51SND1C-ROTUL
• Description: IC 8051 MCU FLASH 64K MP3 80TQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND1C-ROTUL

• 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: 44
• 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
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.4
16
Registers
AT8xC51SND1C
Table 16. CKCON Register
CKCON (S:8Fh) – Clock Control Register
Reset Value = 0000 000Xb (AT89C51SND1C) or 0000 0000b (AT83SND1C)
Table 17. PLLCON Register
PLLCON (S:E9h) – PLL Control Register
Number
Number
TWIX2
7 - 6
5 - 4
Bit
R1
Bit
7
7
6
5
4
3
2
1
0
7
3
Mnemonic Description
Mnemonic Description
PLLRES
TWIX2
WDX2
WDX2
T1X2
T0X2
SIX2
R1:0
Bit
X2
R0
Bit
6
6
-
-
-
Two-Wire Clock Control Bit
Set to select the oscillator clock divided by 2 as TWI clock input (X2
independent).
Clear to select the peripheral clock as TWI clock input (X2 dependent).
Watchdog Clock Control Bit
Set to select the oscillator clock divided by 2 as watchdog clock input (X2
independent).
Clear to select the peripheral clock as watchdog clock input (X2 dependent).
Reserved
The values read from this bit is indeterminate. Do not set this bit.
Enhanced UART Clock (Mode 0 and 2) Control Bit
Set to select the oscillator clock divided by 2 as UART clock input (X2
independent).
Clear to select the peripheral clock as UART clock input (X2 dependent)..
Reserved
The values read from this bit is indeterminate. Do not set this bit.
Timer 1 Clock Control Bit
Set to select the oscillator clock divided by 2 as timer 1 clock input (X2
independent).
Clear to select the peripheral clock as timer 1 clock input (X2 dependent).
Timer 0 Clock Control Bit
Set to select the oscillator clock divided by 2 as timer 0 clock input (X2
independent).
Clear to select the peripheral clock as timer 0 clock input (X2 dependent).
System Clock Control Bit
Clear to select 12 clock periods per machine cycle (STD mode, F
F
Set to select 6 clock periods per machine cycle (X2 mode, F
PLL Least Significant Bits R Divider
2 LSB of the 10-bit R divider.
Reserved
The values read from these bits are always 0. Do not set these bits.
PLL Reset Bit
Set this bit to reset the PLL.
Clear this bit to free the PLL and allow enabling.
OSC
/
5
5
-
2).
-
SIX2
4
4
-
PLLRES
3
3
-
T1X2
2
2
-
PLLEN
T0X2
1
CPU
1
4109L–8051–02/08
= F
CPU
PER
= F
PLOCK
= F
X2
PER
0
0
OSC
=
).