Specifications

I-10 EPSON S1C6S2N7 TECHNICAL HARDWARE
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
When, for instance, mask option D (K00*K01*K02*K03) is
selected, an initial reset is executed when the signals input
to the four ports K00–K03 are all high at the same time.
If you use this function, make sure that the specified ports
do not go high at the same time during normal operation.
An initial reset initializes the CPU as shown in the table
below.
Internal register fol-
lowing initialization
Table 2.2.3
Initial values
CPU Core
Name
Program counter step
Program counter page
New page pointer
Stack pointer
Index register X
Index register Y
Register pointer
General register A
General register B
Interrupt flag
Decimal flag
Zero flag
Carry flag
Signal
PCS
PCP
NPP
SP
X
Y
RP
A
B
I
D
Z
C
Number of Bits
8
4
4
8
8
8
4
4
4
1
1
1
1
Setting Value
00H
1H
1H
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
0
0
Undefined
Undefined
Peripheral Circuits
Name
RAM
Display memory
Other peripheral circuit
Number of Bits
80 × 4
26 × 4
–
Setting Value
Undefined
Undefined
*1
*1: See section 4.1, "Memory Map"
Test Pin (TEST)
This pin is used when IC is inspected for shipment.
During normal operation connect it to VSS.
2.3