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ZAMC4100GA2R Datasheet(PDF) 130 Page - Renesas Technology Corp |
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ZAMC4100GA2R Datasheet(HTML) 130 Page - Renesas Technology Corp |
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130 / 156 page  ZAMC4100 Datasheet © 2016 Integrated Device Technology, Inc. 130 January 26, 2016 4.10.4. SPI Registers The registers of the SPI module are mapped into the system address space between 0x4000_1820 and 0x4000_1BFF. Unused addresses must not be accessed. Table 4.21 Register [0x4000_1820] Z1_SPICFG Z1_SPICFG ADD:0x4000_1820 Bit Name Ext. Access Int. Access Reset Value Description 0 RXOVERFLOW R / W R 0 When set to 1, the corresponding status bit is allowed to drive the IRQ output. 1 RXFULL R / W R 0 When set to 1, the corresponding status bit is allowed to drive the IRQ output. 2 TXEMPTY R / W R 0 When set to 1, the corresponding status bit is allowed to drive the IRQ output. 3 WRCOLL R / W R 0 When set to 1, the corresponding status bit is allowed to drive the IRQ output. 4 --- R --- 0 Unused; always read as 0. 5 SAMPLEPOS R / W R 0 This bit selects whether data on MISO will be sampled at the sampling edge (set to 0) or at shift edge (set to 1). Note: Change this bit only when the module is disabled (SPIEN = 0) or when no transfer is in progress. 6 SSN R / W R / W 1 This bit directly controls the SSN line. 7 SPIEN R / W R / W 0 Enable for SPI module. 31 : 8 --- R --- 0 Unused; always read as 0. Table 4.22 Register [0x4000_1824] Z1_SPIDATA Z1_SPIDATA ADD:0x4000_1824 Bit Name Ext. Access Int. Access Reset Value Description 7 : 0 SPIDATA R / W R / W 0 When writing a byte to this register, the value is stored in the TxBuffer. Additionally a WRITE access to this register clears the TXEMPTY flag in the Z1_SPISTAT register (Table 4.24). When reading this register, the contents of the RxBuffer is returned. Additionally a READ access to this register clears the RXFULL flag in Z1_SPISTAT. Note: When writing to this register when TxBuffer is full, the TxBuffer keeps its contents and the written byte is rejected. This is signaled by the WRCOLL flag in Z1_SPISTAT. 31 : 8 --- R --- 0 Unused; always read as 0. |
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