M42800A Atmel Corporation, M42800A Datasheet - Page 187
M42800A
Manufacturer Part Number
M42800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M42800A.pdf
(224 pages)
4.M42800A.pdf
(27 pages)
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
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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
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