Memory Signal Connections; External Pin Mapping - NEC uPD98502 User Manual

3.4.3 Memory signal connections

SMA[20:0]
SMD[31:0]
SRMCS_B
SRMOE_B
µ µ µ µ PD98502
SDWE_B
SDCS_B
SDRAS_B
SDCAS_B
SDCKE[1:0]
SDCLK[1:0]
SDQM[3:0]
(SDQM=SMA[17:14])
External Pin
Name
SMA
SMD
SDCS_B
SDRAS_B
SDCAS_B
SDWE_B
SDCKE
SDCLK
SRMCS_B
SRMOE_B
RMSL
Remark RMSL signal determines boot memory data bus size.
CHAPTER 3 SYSTEM CONTROLLER
A[20:0]
CS_B
OE_B
WE_B
Table 3-3. External Pin Mapping
Bits
[13:0] A[13:0]
[17:14] A[17:14]
[20:18] A[20:18]
[31:0] D[31:0]
---
---
---
SDWE_B
[1:0] ---
[1:0] ---
SRMCS_B
SRMOE_B
[1:0] ---
Preliminary User's Manual S15543EJ1V0UM
ADDRESS
DATA
D[31:0]
Flash
PROM
A[13:0]
WE_B
CS_B
RAS_B
CAS_B
CKE
CLK[1:0]
DQM[3:0]
Access to ROM
A[13:0]
SDQM[3:0]
DQ[31:0]
SDCS_B
SDRAS_B
SDCAS_B
SDWE_B
SDCKE[1:0]
SDCLK[1:0]
---
---
---
DQ[31:0]
SDRAM
Access to SDRAM
205