M55800A Atmel Corporation, M55800A Datasheet - Page 233

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

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

23. JTAG Boundary-scan Register
1745F–ATARM–06-Sep-07
The Boundary-scan Register (BSR) contains 256 bits which correspond to active pins and asso-
ciated control signals.
Each AT91M55800A input pin has a corresponding bit in the Boundary-scan Register for
observability.
Each AT91M55800A output pin has a corresponding 2-bit register in the BSR. The OUTPUT bit
contains data which can be forced on the pad. The CTRL bit can put the pad into high imped-
ance.
Each AT91M55800A in/out pin corresponds to a 3-bit register in the BSR. The OUTPUT bit con-
tains data that can be forced on the pad. The INPUT bit is for the observability of data applied to
the pad. The CTRL bit selects the direction of the pad.
Table 23-1.
Number
256
255
254
253
252
251
250
249
248
247
246
245
244
243
242
241
240
239
238
237
236
235
234
233
Bit
JTAG Boundary-scan Register
PB18/BMS
Pin Name
NWDOVF
NWAIT
MCKO
NRST
PB17
PB16
PB15
PB14
PB13
PB13
Pin Type
OUTPUT
OUTPUT
IN/OUT
IN/OUT
IN/OUT
IN/OUT
IN/OUT
IN/OUT
IN/OUT
INPUT
INPUT
AT91M5880A
Associated BSR
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
CTRL
CTRL
CTRL
CTRL
CTRL
CTRL
CTRL
CTRL
Cells
233