Register Descriptions; Basic Registers - Epson S1D13506 Technical Manual

Epson Research and Development
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8.3 Register Descriptions

8.3.1 Basic Registers

Revision Code Register
REG[000h]
Product Code Product Code
Bit 5 Bit 4
bits 7-2
bits 1-0
Miscellaneous Register
REG[001h]
Register/
Memory n/a
Select
bit 7
bit 2
bit 1
bit 0
Hardware Functional Specification
Issue Date: 02/03/26
Product Code Product Code
Bit 3 Bit 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.
Revision Code Bits [1:0]
This is a read-only register that indicates the revision code of the chip. The revision code is
01b.
n/a n/a
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.
Reserved.
This bit must be set to 0.
Reserved.
This bit must be set to 0.
Reserved.
This bit must be set to 0.
Product Code Product Code
Bit 1 Bit 0
n/a Reserved
Page 125
RO
Revision Revision
Code Bit 1 Code Bit 0
RW
Reserved Reserved
S1D13506
X25B-A-001-12