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