M40800 Atmel Corporation, M40800 Datasheet - Page 181
M40800
Manufacturer Part Number
M40800
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(21 pages)
3.M40800.pdf
(18 pages)
4.M40800.pdf
(153 pages)
Specifications of M40800
Flash (kbytes)
0 Kbytes
Pin Count
100
Max. Operating Frequency
40 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)
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
1.8/3.3
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
No
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7.6
ARM DDI 0029G
Data bus control
Figure 7-5 shows the ARM7TDMI data bus control timing. The timing parameters used
in Figure 7-5 are listed in Table 7-5.
The cycle shown in Figure 7-5 is a data write cycle because nENOUT was driven LOW
during phase one. Here, DBE has first been used to modify the behavior of the data bus,
and then nENIN.
nENOUT
D[31:0]
nENIN
MCLK
DBE
Note
Copyright © 1994-2001. All rights reserved.
Symbol
T
T
T
T
T
T
dbe
dbnen
dbz
doh
dout
dout
T
T
dbnen
dbz
Parameter
Data bus enable time from DBEr
DBE to nENOUT valid
Data bus disable time from DBEf
DOUT[31:0] hold from MCLKf
MCLKf to D[31:0] valid
T
dbe
Table 7-5 Data bus control timing parameters
T
dbz
Figure 7-5 Data bus control timing
T
dbnen
T
dbe
AC and DC Parameters
Parameter type
Maximum
Maximum
Minimum
Maximum
Maximum
T
doh
7-9
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