M42800A Atmel Corporation, M42800A Datasheet - Page 6

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

3. Pin Description
Table 3-1.
6
Module
EBI
AIC
TC
USART
SPIA
SPIB
PIO
ST
AT91M42800A
Name
A0 - A23
D0 - D15
CS4 - CS7
NCS0 - NCS3
NWR0
NWR1
NRD
NWE
NOE
NUB
NLB
NWAIT
BMS
PME
IRQ0 - IRQ3
FIQ
TCLK0 - TCLK5
TIOA0 - TIOA5
TIOB0 - TIOB5
SCK0 - SCK1
TXD0 - TXD1
RXD0 - RXD1
SPCKA/SPCKB
MISOA/MISOB
MOSIA/MOSIB
NSSA/NSSB
NPCSA0 - NPCSA3
NPCSB0 - NPCSB3
PA0 - PA29
PB0 - PB23
NWDOVF
AT91M42800A Pin Description
Function
Chip Select
Chip Select
Boot Mode Select
Protect Mode Enable
Timer External Clock
Multi-purpose Timer I/O Pin B
Address Bus
Data Bus
Lower Byte 0 Write Signal
Lower Byte 1 Write Signal
Read Signal
Write Enable
Output Enable
Upper Byte Select (16-bit SRAM)
Lower Byte Select (16-bit SRAM)
Wait Input
External Interrupt Request
Fast External Interrupt Request
Multi-purpose Timer I/O Pin A
External Serial Clock
Transmit Data Output
Receive Data Input
Clock
Master In Slave Out
Master Out Slave In
Slave Select
Peripheral Chip Selects
Programmable I/O Port A
Programmable I/O Port B
Watchdog Timer Overflow
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Type
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Low
Active
Level
High
High
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Comments
All valid after reset
A23 - A20 after reset
Used in Byte Write option
Used in Byte Write option
Used in Byte Write option
Used in Byte Select option
Used in Byte Select option
Used in Byte Select option
Used in Byte Select option
Sampled during reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
Input after reset
Input after reset
Open drain
1779ES–ATARM–14-Apr-06