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PD46184095BF1-E33Y-EQ1 Datasheet(PDF) 5 Page - Renesas Technology Corp |
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PD46184095BF1-E33Y-EQ1 Datasheet(HTML) 5 Page - Renesas Technology Corp |
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5 / 34 page  μPD46184095B, μPD46184185B R10DS0115EJ0200 Rev.2.00 Page 5 of 34 Nov 09, 2012 Pin Description (1/2) Symbol Type Description A Input Synchronous Address Inputs: These inputs are registered and must meet the setup and hold times around the rising edge of K. All transactions operate on a burst of two words (one clock period of bus activity). These inputs are ignored when device is deselected, i.e., NOP (LD# = HIGH). D0 to Dxx Input Synchronous Data Inputs: Input data must meet setup and hold times around the rising edges of K and K# during WRITE operations. See Pin Arrangement for ball site location of individual signals. X9 device uses D0 to D8. X18 device uses D0 to D17. Q0 to Qxx Output Synchronous Data Outputs: Output data is synchronized to the respective C and C# or to K and K# rising edges if C and C# are tied HIGH. Data is output in synchronization with C and C# (or K and K#), depending on the LD# and R, W# command. See Pin Arrangement for ball site location of individual signals. X9 device uses Q0 to Q8. x18 device uses Q0 to Q17. LD# Input Synchronous Load: This input is brought LOW when a bus cycle sequence is to be defined. This definition includes address and read/write direction. All transactions operate on a burst of 2 data (one clock period of bus activity). R, W# Input Synchronous Read/Write Input: When LD# is LOW, this input designates the access type (READ when R, W# is HIGH, WRITE when R, W# is LOW) for the loaded address. R, W# must meet the setup and hold times around the rising edge of K. BWx# Input Synchronous Byte Writes: When LOW these inputs cause their respective byte to be registered and written during WRITE cycles. These signals must meet setup and hold times around the rising edges of K and K# for each of the two rising edges comprising the WRITE cycle. See Pin Arrangement for signal to data relationships. X9 device uses BW0#. x18 device uses BW0#, BW1#. See Byte Write Operation for relation between BWx# and Dxx. K, K# Input Input Clock: This input clock pair registers address and control inputs on the rising edge of K, and registers data on the rising edge of K and the rising edge of K#. K# is ideally 180 degrees out of phase with K. All synchronous inputs must meet setup and hold times around the clock rising edges. C, C# Input Output Clock: This clock pair provides a user controlled means of tuning device output data. The rising edge of C# is used as the output timing reference for first output data. The rising edge of C is used as the output reference for second output data. Ideally, #C is 180 degrees out of phase with C. When use of K and K# as the reference instead of C and C#, then fixed C and C# to HIGH. Operation cannot be guaranteed unless C and C# are fixed to HIGH (i.e. toggle of C and C#) |
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