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AS4C128M32MD2-18BIN Datasheet(PDF) 4 Page - Alliance Semiconductor Corporation |
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AS4C128M32MD2-18BIN Datasheet(HTML) 4 Page - Alliance Semiconductor Corporation |
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4 / 103 page  Signal Pin Description Pin Type Function CK, CK (CK, CK#) (CK_t, CK_c) Input Clock : CK and CK are differential clock inputs. All CA inputs are sampled onboth rising and falling edges of CK. CS and CKE inputs are sampled at the risingedge of CK. AC timings are referenced to clock. CKE Input Clock Enable : CKE HIGH activates and CKE LOW deactivates the internal clocksignals, input buffers, and output drivers. Power-saving modes are entered andexited via CKE transitions. CKE is considered part of the command code. CKE issampled at the rising edge of CK. CS (CS#) (CS_n) Input Chip Select : CS is considered part of the command code and is sampled at therising edge of CK. CA0~CA9 Input Command/address inputs: Provide the command and address inputs accordingto the command truth table. DM0~DM3 Input Input Data Mask : DM is an input mask signal for write data. Although DM ballsare input-only, the DM loading is designed to match that of DQ and DQS balls.DM[3:0] is DM for each of the four data bytes, respectively. DQ0~DQ31 Input/output Data input/output: Bidirectional data bus. DQS[3:0] (DQS_t[3:0]), DQS[3:0] DQS#[3:0] (DQS_c[3:0]) Input/output Data strobe: The data strobe is bidirectional (used for read and write data) andcomplementary (DQS and DQS). It is edge-aligned output with read data and centered input with write data. DQS[3:0]/ DQS[3:0] is DQS for each of the four data bytes, respectively. NC No Connect: No internal electrical connection is present. ZQ Input External impedance (240 ohm): This signal is used to calibrate the device out-put impedance. VDD1 Supply Core power: Supply 1. VDD2 Supply Core power: Supply 2. VDDQ Supply DQ power supply: Isolated on the die for improved noise immunity. VDDCA Supply Command/address power supply: Command/address power supply. VREFDQ, VREFCA Supply Reference voltage: VREFCA is reference for command/address input buffers,VREFDQ is reference for DQ input buffers. VSS Supply Common ground AS4C128M32MD2-18BCN AS4C128M32MD2-18BIN Confidential -4／103- Rev.1.0 June 2016 |
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