Epson S1C63558 - Manual (Page 21)

S1C63558 TECHNICAL MANUAL EPSON 11
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
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(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
FOUT
XRMUTE
XRMUTE
XTMUTE
XTMUTE
TOUT
TOUT
BZ
BZ
XBZ
XBZ
HFO
HFO
HDO
HDO
Table 2.2.4.1(b) List of shared terminal settings (Pxx)
Terminal
name
P00–P03
P10
P11
P12
P13
P20
P21
P22
P23
P30
P31
P32
P33
Special output Serial I/F *2 Terminal status
at initial reset
P00–P03 (Input & Pull-up *1)
P10 (Input & Pull-up *1)
P11 (Input & Pull-up *1)
P12 (Input & Pull-up *1)
P13 (Input & Pull-up *1)
P20 (Input & Pull-up *1)
P21 (Input & Pull-up *1)
P22 (Input & Pull-up *1)
P23 (Input & Pull-up *1)
P30 (Input & Pull-up *1)
P31 (Input & Pull-up *1)
P32 (Input & Pull-up *1)
P33 (Input & Pull-up *1)
CL
CL
Clk-sync. Master
SIN(I)
SOUT(O)
SCLK(O)
SIN(I)
SOUT(O)
SCLK(O)
Clk-sync. Slave
SIN(I)
SOUT(O)
SCLK(I)
SRDY(O)
SIN(I)
SOUT(O)
SCLK(I)
SRDY(O)
FR
FR
Async.
SIN(I)
SOUT(O)
SIN(I)
SOUT(O)
∗1
When "with pull-up" is selected by mask option (high impedance when "gate direct" is selected)
∗2
The P10–P13 I/O terminals are used for serial I/F (1) and the P30–P33 I/O terminals are for serial I/F (2).
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 .