R40008 Atmel Corporation, R40008 Datasheet - Page 117

• Manufacturer Part Number: R40008
• Manufacturer: Atmel Corporation

Specifications of R40008

• Flash (kbytes): 0 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 75 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 256
• 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
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: No
• Calibrated Rc Oscillator: No

4.5.2
ARM DDI 0029G
Connecting multiple coprocessors
If you have multiple coprocessors in your system, connect the handshake signals as
follows:
nCPI
CPA and CPB
You must multiplex the output data from the coprocessors.
Connecting multiple coprocessors is shown in Figure 4-7 on page 4-14.
The logic for Figure 4-6 is as follows:
Copyright © 1994-2001. All rights reserved.
Connect this signal to all coprocessors present in the system.
The individual CPA and CPB outputs from each coprocessor must be
ANDed together, and connected to the CPA and CPB inputs on the
ARM7TDMI processor.
ARM core
Figure 4-6 Coprocessor connections with unidirectional bus
DOUT
DIN
0
1
CSEL
CPDIN
Coprocessor
ASEL
0
1
CPDOUT
0
1
CPDRIVE
Coprocessor Interface
Memory
system
4-13