M42800A Atmel Corporation, M42800A Datasheet - Page 187

• 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

7.12
ARM DDI 0029G
Symbol
T
T
T
T
T
T
abth
abts
im
is
rm
rs
Exception timing
Parameter
ABORT hold time from MCLKf
ABORT set up time to MCLKf
Asynchronous interrupt guaranteed nonrecognition time, with ISYNC=0
Asynchronous interrupt set up time to MCLKf for guaranteed recognition, with ISYNC=0
Reset guaranteed nonrecognition time
Reset setup time to MCLKr for guaranteed recognition
Figure 7-11 shows the ARM7TDMI processor exception timing. The timing parameters
used in Figure 7-11 are listed in Table 7-11.
In Figure 7-11, to guarantee recognition of the asynchronous interrupt (ISYNC=0) or
reset source, the appropriate signals must be setup or held as follows:
•
•
These inputs can be applied fully asynchronously where the exact cycle of recognition
is unimportant.
nRESET
ABORT
MCLK
nIRQ
nFIQ
setup T
hold T
Note
Copyright © 1994-2001. All rights reserved.
im
is
and T
and T
is
rs
respectively after the corresponding clock edge.
respectively before the corresponding clock edge
T
rs
Table 7-11 Exception timing parameters
T
rm
Figure 7-11 Exception timing
T
abts
T
is
AC and DC Parameters
T
T
abth
im
Minimum
Parameter
type
Minimum
Minimum
Maximum
Maximum
Minimum
7-15