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AT89C5131A-L Schematic ( Datenblatt PDF ) - ATMEL

Teilenummer AT89C5131A-L
Beschreibung 8-bit Flash Microcontroller
Hersteller ATMEL
Logo ATMEL Logo 

Gesamt 30 Seiten
		
AT89C5131A-L Datasheet, Funktion
Features
80C52X2 Core (6 Clocks per Instruction)
– Maximum Core Frequency 48 MHz in X1 Mode, 24 MHz in X2 Mode
– Dual Data Pointer
– Full-duplex Enhanced UART (EUART)
– Three 16-bit Timer/Counters: T0, T1 and T2
– 256 Bytes of Scratchpad RAM
16/32-Kbyte On-chip Flash EEPROM In-System Programming through USB
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
3-KbyteFlash EEPROM for Bootloader
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
1-Kbyte EEPROM Data (
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
On-chip Expanded RAM (ERAM): 1024 Bytes
Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply
USB 1.1 and 2.0 Full Speed Compliant Module with Interrupt on Transfer Completion
– Endpoint 0 for Control Transfers: 32-byte FIFO
– 6 Programmable Endpoints with In or Out Directions and with Bulk, Interrupt or
Isochronous Transfers
• Endpoint 1, 2, 3: 32-byte FIFO
• Endpoint 4, 5: 2 x 64-byte FIFO with Double Buffering (Ping-pong Mode)
• Endpoint 6: 2 x 512-byte FIFO with Double Buffering (Ping-pong Mode)
– Suspend/Resume Interrupts
– Power-on Reset and USB Bus Reset
– 48 MHz DPLL for Full-speed Bus Operation
– USB Bus Disconnection on Microcontroller Request
5 Channels Programmable Counter Array (PCA) with 16-bit Counter, High-speed
Output, Compare/Capture, PWM and Watchdog Timer Capabilities
Programmable Hardware Watchdog Timer (One-time Enabled with Reset-out): 50 ms to
6s at 4 MHz
Keyboard Interrupt Interface on Port P1 (8 Bits)
TWI (Two Wire Interface) 400Kbit/s
SPI Interface (Master/Slave Mode)
34 I/O Pins
4 Direct-drive LED Outputs with Programmable Current Sources: 2-6-10 mA Typical
4-level Priority Interrupt System (11 sources)
Idle and Power-down Modes
0 to 32 MHz On-chip Oscillator with Analog PLL for 48 MHz Synthesis
Industrial Temperature Range
Low Voltage Range Supply: 2.7V to 3.6V (3.0V to 3.6V required for USB)
Packages: SO28, PLCC52, VQFP64
8-bit Flash
Microcontroller
with Full Speed
USB Device
AT89C5131A-L
Rev. 4338F–USB–08/07






AT89C5131A-L Datasheet, Funktion
Signals
All the AT89C5131A-L signals are detailed by functionality on Table 1 through Table 12.
Table 1. Keypad Interface Signal Description
Signal
Name Type Description
Alternate
Function
KIN[7:0)
Keypad Input Lines
I Holding one of these pins high or low for 24 oscillator periods triggers a
keypad interrupt if enabled. Held line is reported in the KBCON register.
P1[7:0]
Table 2. Programmable Counter Array Signal Description
Signal
Name
ECI
Type Description
I External Clock Input
CEX[4:0]
Capture External Input
I/O
Compare External Output
Alternate
Function
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
Table 3. Serial I/O Signal Description
Signal
Name
RxD
TxD
Type Description
Serial Input
I
The serial input for Extended UART.
O
Serial Output
The serial output for Extended UART.
Alternate
Function
P3.0
P3.1
Table 4. Timer 0, Timer 1 and Timer 2 Signal Description
Signal
Name Type Description
Alternate
Function
INT0
Timer 0 Gate Input
INT0 serves as external run control for timer 0, when selected by GATE0
bit in TCON register.
I External Interrupt 0
INT0 input set IE0 in the TCON register. If bit IT0 in this register is set, bits
IE0 are set by a falling edge on INT0. If bit IT0 is cleared, bits IE0 is set by
a low level on INT0.
P3.2
INT1
Timer 1 Gate Input
INT1 serves as external run control for Timer 1, when selected by GATE1
bit in TCON register.
I External Interrupt 1
INT1 input set IE1 in the TCON register. If bit IT1 in this register is set, bits
IE1 are set by a falling edge on INT1. If bit IT1 is cleared, bits IE1 is set by
a low level on INT1.
P3.3
6 AT89C5131A-L
4338F–USB–08/07

6 Page







AT89C5131A-L pdf, datenblatt
PCB Recommandations
Figure 5. USB Pads
VRef
D+
D-
Components must be
close to the
microcontroller
Wires must be routed in Parallel and
must be as short as possible
USB Connector
If possible, isolate D+ and D- signals from other signals
with ground wires
Figure 6. USB PLL
Components must be
close to the
microcontroller
AVss PLLF
Isolate filter components
with a ground wire
12 AT89C5131A-L
4338F–USB–08/07

12 Page


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