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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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SAP5SD-A-G1-R Datenblatt(PDF) 37 Page - Renesas Technology Corp |
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SAP5SD-A-G1-R Datenblatt(HTML) 37 Page - Renesas Technology Corp |
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37 / 67 page  SAP51 / SAP5S Datasheet © 2016 Integrated Device Technology, Inc. 37 January 28, 2016 Table 5.13 Meaning of Master Call Bits I[3:0] with Ext_Addr_4I/4O_Mode = ‘1’ Master Call Bit Operation / Meaning Parallel_Out_4I/4O = ‘0’ Parallel_Out_4I/4O = ‘1’ I2 = ‘0’ I2 = ‘1’ I2 = ‘0’ I2 = ‘1’ I0 D2 = I0 D3 = I1 D1 = unchanged D0 = unchanged D2 = unchanged D3 = unchanged D1 = I1 D0 = I0 D2 = I0 D3 = I1 D1 = DO1_tmp 2) D0 = DO0_tmp 2) D2 = unchanged 1) D3 = unchanged 1) D1 = unchanged 1) D0 = unchanged 1) DO1_tmp = I1 DO0_tmp = I0 I1 I2 I2 = Sel����-bitfortransmissiontoBank_1(D0/D1)/Bank_2(D2/D3) I3 I3 = Sel����-bitforA-Slave/B-Slaveaddressing(seeTable3.2) 1) If I2 = ‘1’ then I0/I1 are directed to temporary data output registers DO0_tmp/DO1_tmp. 2) If I2 = ‘0’ then I0/I1 are directed to the data output registers D2/D3 and DO0_tmp/DO1_tmp are directed to data output registers D0/D1. In order to ensure that both Bank_1 and Bank_2 data are refreshed continuously, the SAP5 supervises the alternation of the I2 Sel-bit by use of the 4I/4O Watchdog. The 4I/4O Watchdog gets activated as soon as • The Communication Watchdog is activated (refer to section 5.17 and Table 5.22). • The SAP5 is operated in Extended Address Mode and the Ext_Addr_4I/4O_Mode flag is set (= ‘1’) in the EEPROM. • Slave address is not equal to zero (0HEX). • No EEPROM write access is active. • The slave is activated, i.e. the Data_Exchange_Disable flag is cleared (‘0’). If there is no alternation of the I2 bit for more than 327ms (+16ms) after the activation of the slave, the 4I/4O Watchdog takes the following actions: • It generates Data and Parameter Strobe signals at the DSTBn and PSTBn pins with timing according to Figure 5.2 and Figure 5.3. • After DSTBn and PSTBn strobe generation has finished, the 4I/4O Watchdog invokes an unconditioned SAP5 reset. It sets the Data_Exchange_Disable flag and afterwards starts the SAP5 initialization procedure, switching all Data and Parameter Outputs inactive. Input data is captured and returned to the master at every cycle, independent of the value of information bit I2. |
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