M42800A Atmel Corporation, M42800A Datasheet - Page 90

• 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

Memory Interface
3-20
Copyright © 1994-2001. All rights reserved.
ARM7TDMI
read data to
data direction
write data
from core
nENOUT
control from
D[31:0]
A[31:0]
MCLK
nRW
core
core
Figure 3-16 Data bus control circuit
Figure 3-15 Data write bus cycle
memory cycle
scan
scan
scan
cell
cell
cell
ARM DDI 0029G
nENOUT
DBE
nENIN
TBE
D[31:0]