M55800A Atmel Corporation, M55800A Datasheet - Page 233
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.6.3
B.6.4
ARM DDI 0029G
Instruction register
Scan path select register
Purpose
Length
Operating mode
Purpose
Length
Operating mode
The number of the currently selected scan chain is reflected on the SCREG[3:0]
outputs. The TAP controller can be used to drive external scan chains in addition to
those within the ARM7TDMI macrocell. The external scan chain must be assigned a
number and control signals for it can be derived from SCREG[3:0], IR[3:0],
Copyright © 1994-2001. All rights reserved.
The 32-bit device identification code is loaded into the ID register
from its parallel inputs during the CAPTURE-DR state.
The least significant bit of the register is scanned out first.
Changes the current TAP instruction.
4 bits.
In the SHIFT-IR state, the instruction register is selected as the
serial path between TDI and TDO.
During the UPDATE-IR state, the value in the instruction register
becomes the current instruction.
During the CAPTURE-IR state, the binary value 0001 is loaded
into this register. This value is shifted out during SHIFT-IR. On
reset, IDCODE becomes the current instruction.
The least significant bit of the register is scanned in or out first.
Changes the current active scan chain.
4 bits.
SCAN_N as the current instruction in the SHIFT-DR state selects
the scan path select register as the serial path between TDI and
TDO.
During the CAPTURE-DR state, the value 1000 binary is loaded
into this register. This value is loaded out during SHIFT-DR, while
a new value is loaded in.
During the UPDATE-DR state, the value in the register selects a
scan chain to become the currently active scan chain. All further
instructions, such as INTEST, then apply to that scan chain. The
currently selected scan chain changes only when a SCAN_N
instruction is executed, or when a reset occurs. On reset, scan
chain 0 is selected as the active scan chain.
The least significant bit of the register is scanned in or out first.
Debug in Depth
B-15
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