Epson Research and Development
Page 125
Vancouver Design Center
8.3 Register Descriptions
8.3.1 Basic Registers
Revision Code Register
REG[000h]
RO
Product Code Product Code Product Code Product Code Product Code Product Code
Revision
Code Bit 1
Revision
Code Bit 0
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
bits 7-2
Product Code Bits [5:0]
This is a read-only register that indicates the product code of the chip. The product code
for S1D13506 is 000100b.
bits 1-0
Revision Code Bits [1:0]
This is a read-only register that indicates the revision code of the chip. The revision code is
01b.
Miscellaneous Register
REG[001h]
RW
Register/
Memory
Select
n/a
n/a
n/a
n/a
Reserved
Reserved
Reserved
bit 7
Register Memory Select
At reset, the Register/Memory Select bit is set to 1. This means that only REG[000h]
(read-only) and REG[001h] are accessible until a write to REG[001h] sets bit 7 to 0
making all registers and memory accessible. When debugging a new hardware design,
this can sometimes give the appearance that the interface is not working, so it is important
to remember to clear this bit before proceeding with debugging.
bit 2
bit 1
bit 0
Reserved.
This bit must be set to 0.
Reserved.
This bit must be set to 0.
Reserved.
This bit must be set to 0.
Hardware Functional Specification
Issue Date: 01/02/06
S1D13506
X25B-A-001-10
EPSON [ EPSON COMPANY ]
