M55800A Atmel Corporation, M55800A Datasheet - Page 221
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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B.1
B.1.1
ARM DDI 0029G
Scan chains and JTAG interface
Scan chain implementation
There are three JTAG-style scan chains within the ARM7TDMI core. These enable
debugging and configuration of EmbeddedICE Logic.
A JTAG style Test Access Port (TAP) controller controls the scan chains. For further
details of the JTAG specification, refer to IEEE Standard 1149.1 - 1990 Standard Test
Access Port and Boundary-Scan Architecture.
In addition, support is provided for an optional fourth scan chain. This is intended to be
used for an external boundary-scan chain around the pads of a packaged device. The
control signals provided for this scan chain are described in Scan chain 3 on page B-20.
The scan cells are not fully JTAG compliant.
The following sections describe:
•
•
The three scan paths are referred to as:
1.
2.
3.
The scan chains are shown in Figure B-1 on page B-4.
Scan chain implementation on page B-3
TAP state machine on page B-5.
Scan chain 0 on page B-4
Scan chain 1 on page B-4
Scan chain 2 on page B-4.
Note
Copyright © 1994-2001. All rights reserved.
Debug in Depth
B-3
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