M55800A Atmel Corporation, M55800A Datasheet - Page 224
M55800A
Manufacturer Part Number
M55800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M55800A.pdf
(29 pages)
4.M55800A.pdf
(256 pages)
5.M55800A.pdf
(28 pages)
Specifications of M55800A
Flash (kbytes)
0 Kbytes
Pin Count
176
Max. Operating Frequency
33 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
58
Ext Interrupts
58
Usb Speed
No
Usb Interface
No
Spi
1
Uart
3
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
72
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
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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Debug in Depth
B.2
B-6
Resetting the TAP controller
The boundary-scan (JTAG) interface includes a state machine controller named the TAP
controller. To force the TAP controller into the correct state after power-up, you must
apply a reset pulse to the nTRST signal:
•
•
A clock on TCK is not necessary to reset the device.
The nTRST signal:
1.
2.
3.
4.
You must use nTRST to reset the boundary-scan interface at least once after power up.
After this the TAP controller state machine can be put into the TEST-LOGIC RESET
state to subsequently reset the boundary-scan interface.
When the boundary-scan interface or EmbeddedICE is to be used, nTRST must
be driven LOW and then HIGH again.
When the boundary-scan interface or EmbeddedICE is not to be used, the nTRST
input can be tied permanently LOW.
Selects system mode. This means that the boundary-scan cells do not intercept
any of the signals passing between the external system and the core.
Selects the IDCODE instruction.
When the TAP controller is put into the SHIFT-DR state and TCK is pulsed, the
contents of the ID register are clocked out of TDO.
Sets the TAP controller state machine to the TEST-LOGIC RESET state.
Sets the scan chain select register to
chain, if present.
Note
Note
Copyright © 1994-2001. All rights reserved.
, which selects the external boundary-scan
ARM DDI 0029G
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