
S1C6F567 TECHNICAL MANUAL
EPSON
9
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
When data is written to the EXT register, the E flag is set and the following instruction will be executed in
the extended addressing mode. If an instruction which does not permit extended operation is used as the
following instruction, the operation is not guaranteed. Therefore, do not write data to the EXT register for
initialization only.
Refer to the "S1C63000 Core CPU Manual" for extended addressing and usable instructions.
Table 2.2.2.1 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
8
16
8
1
16
Setting value
Undefined
0110H
Undefined
0
Undefined
Name
RAM
Display memory
Other pheripheral circuits
Peripheral circuits
Number of bits
4
–
Setting value
Undefined
See Section 4.1, "Memory Map".
2.2.3 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 2.2.3.1 shows the list of the shared terminal settings.
Table 2.2.3.1(a) List of shared terminal settings (Rxx)
Terminal
name
R00
R01
R02
R03
R10
R11
R12
R13
R20–R23
Special output
Terminal status
at initial reset
R00 (HIGH output)
R01 (HIGH output)
R02 (HIGH output)
R03 (HIGH output)
R10 (HIGH output)
R11 (HIGH output)
R12 (HIGH output)
R13 (HIGH output)
R20–R23 (HIGH output)
FOUT
XRMUTE
XTMUTE
TOUT
BZ
XBZ
HFO
HDO
Table 2.2.3.1(b) List of shared terminal settings (Pxx)
Terminal
name
P00–P03
P10
P11
P12
P13
P20
P21
P22
P23
P30–P33
Special output
Serial I/F
Terminal status
at initial reset
P00–P03 (Input & Pull-up)
P10 (Input & Pull-up)
P11 (Input & Pull-up)
P12 (Input & Pull-up)
P13 (Input & Pull-up)
P20 (Input & Pull-up)
P21 (Input & Pull-up)
P22 (Input & Pull-up)
P23 (Input & Pull-up)
P30–P33 (Input & Pull-up)
CL
Clk-sync. Master
SIN(I)
SOUT(O)
SCLK(O)
Clk-sync. Slave
SIN(I)
SOUT(O)
SCLK(I)
SRDY(O)
FR
Async.
SIN(I)
SOUT(O)
For setting procedure of the functions, see explanations for each of the peripheral circuits.