Specifications

II-12 EPSON S1C62N82 TECHNICAL SOFTWARE
CHAPTER 2: INITIAL RESET
INITIAL RESET
Internal Register Status on Initial Reset
Following an initial reset, the internal registers and internal
data memory area are initialized to the values shown in
Tables 2.1.1 and 2.1.2.
Internal Register Bit Length Initial Value Following Reset
Program counter step PCS 8 00H
Program counter page PCP 4 1H
New page pointer NPP 4 1H
Stack pointer SP 8 Undefined
Index register X 8 Undefined
Index register Y 8 Undefined
Register pointer RP 4 Undefined
General register A 4 Undefined
General register B 4 Undefined
Interrupt flag I 1 0
Decimal flag D 1 0
Zero flag Z 1 Undefined
Carry flag C 1 Undefined
Internal Data Initial Value
Memory Area Following Reset
RAM data 4 × 144 Undefined 000H–08FH
Display memory 4 × 80 Undefined 090H–0DFH
Internal I/O register See Tables 1.4.1 (a)–(g) 0E0H–0FCH
2.1
Table 2.1.1
Initial values of internal
registers
CHAPTER 2
Table 2.1.2
Initial values of internal data
memory area
Bit Length Address