AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 54

• 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

Figure 11-3. Mode 0 Overflow Period Formula
11.3.2
Figure 11-4. Timer/Counter x (x = 0 or 1) in Mode 1
Figure 11-5. Mode 1 Overflow Period Formula
11.3.3
Figure 11-6. Timer/Counter x (x = 0 or 1) in Mode 2
Figure 11-7. Mode 2 Autoreload Period Formula
54
AT8xC51SND2C/MP3B
Mode 1 (16-bit Timer)
Mode 2 (8-bit Timer with Auto-Reload)
INTx
INTx
CLOCK
CLOCK
TIMx
TIMx
Tx
Tx
TMOD Reg
TMOD reg
GATEx
GATEx
÷ 6
÷ 6
Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in cascade
(see Figure 11-4). The selected input increments TL0 register. Figure 11-5 gives the overflow
period calculation formula when in timer mode.
Mode 2 configures Timer 0 as an 8-bit Timer (TL0 register) that automatically reloads from TH0
register (see Table 11-2). TL0 overflow sets TF0 flag in TCON register and reloads TL0 with the
contents of TH0, which is preset by software. When the interrupt request is serviced, hardware
clears TF0. The reload leaves TH0 unchanged. The next reload value may be changed at any
time by writing it to TH0 register. Figure 11-7 gives the autoreload period calculation formula
when in timer mode.
TMOD Reg
TMOD reg
C/Tx#
C/Tx#
0
1
0
1
TCON Reg
TCON reg
TRx
TRx
TFx
TFx
PER
=
PER
TFx
=
6 ⋅
PER
(16384 – (THx, TLx))
6
=
⋅
(65536 – (THx, TLx))
6
F
⋅
TIMx
(256 – THx)
F
F
(8 bits)
TIMx
TIMx
THx
(8 bits)
(8 bits)
THx
TLx
(8 bits)
TLx
Overflow
Overflow
TCON Reg
TCON reg
TFx
TFx
Timer x
Interrupt
Request
Timer x
Interrupt
Request
4341H–MP3–10/07