AT91M55800A-33CJ Atmel, AT91M55800A-33CJ Datasheet - Page 190

• Manufacturer Part Number: AT91M55800A-33CJ
• Description: IC ARM MCU 16BIT 176BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M55800A-33CJ

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 58
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Processor Series: AT91Mx
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 8 KB
• Interface Type: EBI, SPI, USART
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 58
• Number Of Timers: 10 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91EB55
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 8 bit, 2 Channel
• Cpu Family: AT91
• Device Core: ARM7TDMI
• Device Core Size: 32b
• Frequency (max): 33MHz
• Program Memory Size: Not Required
• Total Internal Ram Size: 8KB
• # I/os (max): 58
• Number Of Timers - General Purpose: 6
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 176
• Package Type: BGA
• For Use With: AT91EB55 - KIT EVAL FOR ARM AT91M55800A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

20. SPI: Serial Peripheral Interface
20.1
190
Pin Description
AT91M5880A
The AT91M55800A includes an SPI which provides communication with external devices in
master or slave mode.
The SPI has four external chip selects which can be connected to up to 15 devices. The data
length is programmable, from 8- to 16-bit.
As for the USART, a 2-channel PDC can be used to move data between memory and the SPI
without CPU intervention.
Seven pins are associated with the SPI Interface. When not needed for the SPI function, each of
these pins can be configured as a PIO.
Support for an external master is provided by the PIO Controller Multi-driver option. To configure
an SPI pin as open-drain to support external drivers, set the corresponding bits in the
PIO_MDSR register.
An input filter can be enabled on the SPI input pins by setting the corresponding bits in the
PIO_IFSR.
The NPCS0/NSS pin can function as a peripheral chip select output or slave select input. Refer
to
Figure 20-1. SPI Block Diagram
Table 20-1
APB
for a description of the SPI pins.
MCK
MCK/32
Serial Peripheral Interface
Interrupt Controller
Advanced
INT
NPCS0/NSS
NPCS1
NPCS2
NPCS3
SPCK
MISO
MOSI
Parallel IO
Controller
NPCS0/NSS
1745F–ATARM–06-Sep-07
NPCS1
NPCS2
NPCS3
SPCK
MISO
MOSI