M55800A Atmel Corporation, M55800A Datasheet - Page 201

• 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

• LLB: Local Loopback Enable (Code Label SP_LLB)
0 = Local loopback path disabled.
1 = Local loopback path enabled.
LLB controls the local loopback on the data serializer for testing in master mode only.
• PCS: Peripheral Chip Select (Code Label SP_PCS)
This field is only used if Fixed Peripheral Select is active (PS=0).
If PCSDEC=0:
If PCSDEC=1:
• DLYBCS: Delay Between Chip Selects (Code Label SP_DLYBCS)
This field defines the delay from NPCS inactive to the activation of another NPCS. The DLYBCS time guarantees non-over-
lapping chip selects and solves bus contentions in case of peripherals having long data float times.
If DLYBCS is less than or equal to six, six SPI Master Clock periods will be inserted by default.
Otherwise, the following equation determines the delay:
1745F–ATARM–06-Sep-07
PCS = xxx0NPCS[3:0] = 1110 (Code Label SP_PCS0)
PCS = xx01NPCS[3:0] = 1101 (Code Label SP_PCS1)
PCS = x011NPCS[3:0] = 1011 (Code Label SP_PCS2)
PCS = 0111NPCS[3:0] = 0111 (Code Label SP_PCS3)
PCS = 1111forbidden (no peripheral is selected)
(x = don’t care)
NPCS[3:0] output signals = PCS.
Delay_ Between_Chip_Selects = DLYBCS * SPI_Master_Clock_period
AT91M5880A
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