AT89C5132-RORUL Atmel, AT89C5132-RORUL Datasheet - Page 123

• Manufacturer Part Number: AT89C5132-RORUL
• Description: MCU 8051 FLASH USB 80TQFP
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5132-RORUL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IDE/ATAPI, I²C, MMC, PCM, SPI, UART/USART, USB
• Peripherals: I²S, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 19-5. Data Transmission Format (CPHA = 0)
Figure 19-6. Data Transmission Format (CPHA = 1)
19.1.5
4173E–USB–09/07
SS Management
MOSI (from Master)
MOSI (from Master)
SCK Cycle Number
SCK Cycle Number
MISO (from Slave)
MISO (from Slave)
to Capture Point
SCK (CPOL = 0)
SCK (CPOL = 1)
SCK (CPOL = 0)
SCK (CPOL = 1)
SPEN (Internal)
SPEN (Internal)
Capture Point
SS (to Slave)
SS (to Slave)
AT89C5132 captures data from the SI line while the selected slave captures data from the SO
line.
For simplicity, the following figures depict the SPI waveforms in idealized form and do not pro-
vide precise timing information. For timing parameters refer to the Section “AC Characteristics”.
Note:
Figure 19-5 shows an SPI transmission with CPHA = 0, where the first SCK edge is the MSB
capture point. Therefore the slave starts to output its MSB as soon as it is selected: SS asserted
to low level. SS must then be deasserted between each byte transmission (see Figure 19-7).
SPDAT must be loaded with data before SS is asserted again.
1. When the peripheral is disabled (SPEN = 0), default SCK line is high level.
MSB
MSB
MSB
MSB
1
1
bit 6
bit 6
bit 6
bit 6
2
2
bit 5
bit 5
bit 5
bit 5
3
3
bit 4
bit 4
bit 4
bit 4
4
4
bit 3
bit 3
bit 3
bit 3
5
5
bit 2
bit 2
bit 2
bit 2
6
6
bit 1
bit 1
bit 1
bit 1
7
7
LSB
LSB
LSB
8
8
LSB
AT89C5132
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