S1C63454 TECHNICAL MANUAL
EPSON
11
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
Table 2.2.3.1 Initial values
Name
Data register A
Data register B
Extension register EXT
Index register X
Index register Y
Program counter
Stack pointer SP1
Stack pointer SP2
Zero flag
Carry flag
Interrupt flag
Extension flag
Queue register
CPU core
Symbol
A
B
EXT
X
Y
PC
SP1
SP2
Z
C
I
E
Q
Number of bits
4
4
8
16
16
16
8
8
1
1
1
1
16
Setting value
Undefined
Undefined
Undefined
Undefined
Undefined
0110H
Undefined
Undefined
Undefined
Undefined
0
0
Undefined
Name
RAM
Display memory
Other pheripheral circuits
Peripheral circuits
Number of bits
4
4
–
Setting value
Undefined
Undefined
∗
∗
See Section 4.1, "Memory Map".
2.2.4 Terminal settings at initial resetting
The output port (R) terminals and I/O port (P) terminals are shared with special output terminals and
input/output terminals of the serial interface. These functions are selected by the software. At initial
reset, these terminals are set to the general purpose output port terminals and I/O port terminals. Set
them according to the system in the initial routine. In addition, take care of the initial status of output
terminals when designing a system.
Table 2.2.4.1 shows the list of the shared terminal settings.
Table 2.2.4.1 List of shared terminal settings
Terminal
name
R00
R01
R02
R03
P00–P03
P10
P11
P12
P13
Terminal status
at initial reset
R00 (High output)
R01 (High output)
R02 (High output)
R03 (High output)
P00–P03 (Input & Pull-up
∗
)
P10 (Input & Pull-up
∗
)
P11 (Input & Pull-up
∗
)
P12 (Input & Pull-up
∗
)
P13 (Input & Pull-up
∗
)
Special output
TOUT
FOUT
TOUT
FOUT
Serial I/F
Master
Slave
SIN(I)
SIN(I)
SOUT(O) SOUT(O)
SCLK(O) SCLK(I)
SRDY(O)
∗
When "with pull-up" is selected by mask option (high impedance when "gate direct" is selected)
For setting procedure of the functions, see explanations for each of the peripheral circuits.
2.3 Test Terminal (TEST)
This is the terminal used for the factory inspection of the IC. During normal operation, connect the TEST
terminal to V
DD
.
