Block Diagram - Atmel AT89C5132 Specification Sheet

3. Block Diagram

Figure 3-1. AT89C5132 Block Diagram
INT0 INT1
1 1
Interrupt
Handler Unit
C51 (X2 CORE)
Clock and PLL
Unit
FILT X1 X2
Notes: 1. Alternate function of Port 3
2. Alternate function of Port 4
3. Alternate function of Port 1
AT89C5132
2
V V UV AV
UVSS AVSS
DD SS DD DD
Flash
RAM
64K Bytes
2304 Bytes
Flash Boot
4K Bytes
2
I S/PCM
Audio Interface
RST DOUT DCLK DSEL SCLK
AREF AIN1:0 TXD RXD T0
1 1 1
UART
10-bit A-to-D Timers 0/1
and
Converter Watchdog
BRG
8-BIT INTERNAL BUS
USB MMC
Controller
Interface
D+ D- MCLK
MDAT MCMD
T1 SS MISO MOSI SCK
SCL SDA
1 2 2 2 2 1
SPI/DataFlash
Controller Controller
I/O
Keyboard Ports
Interface IDE
Interface
3
KIN3:0 P0 - P5
1
TWI
4173ES–USB–09/07