![background image](http://html.mh-extra.com/html/nec/78k-0-series/78k-0-series_user-manual_19201393.webp)
CHAPTER 16 SERIAL INTERFACES CSI10 AND CSI11
Preliminary User’s Manual U17260EJ3V1UD
393
16.4 Operation of Serial Interfaces CSI10 and CSI11
Serial interfaces CSI10 and CSI11 can be used in the following two modes.
•
Operation stop mode
•
3-wire serial I/O mode
16.4.1 Operation stop mode
Serial communication is not executed in this mode. Therefore, the power consumption can be reduced. In
addition, the P10/SCK10/T
X
D0, P11/SI10/R
X
D0, P12/SO10, P02/SO11
Note
, P03/SI11
Note
, and P04/SCK11
Note
pins can
be used as ordinary I/O port pins in this mode.
Note
Available only in the
µ
PD78F0534, 78F0535, 78F0536, 78F0537, 78F0537D
(1) Register used
The operation stop mode is set by serial operation mode register 1n (CSIM1n).
To set the operation stop mode, clear bit 7 (CSIE1n) of CSIM1n to 0.
(a) Serial operation mode register 1n (CSIM1n)
CSIM1n can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets CSIM1n to 00H.
Remark
n = 0:
µ
PD78F0531, 78F0532, 78F0533
n = 0, 1:
µ
PD78F0534, 78F0535, 78F0536, 78F0537, 78F0537D
•
Serial operation mode register 10 (CSIM10)
Address: FF80H After reset: 00H R/W
Symbol
<7>
6 5 4 3 2 1 0
CSIM10 CSIE10 TRMD10
0
DIR10
0
0
0
CSOT10
CSIE10
Operation control in 3-wire serial I/O mode
0
Disables
operation
Note 1
and asynchronously resets the internal circuit
Note 2
.
Notes 1.
To use P10/SCK10/T
X
D0 and P12/SO10 as general-purpose ports, set CSIM10 in the default
status (00H).
2.
Bit 0 (CSOT10) of CSIM10 and serial I/O shift register 10 (SIO10) are reset.
•
Serial operation mode register 11 (CSIM11)
Address: FF88H After reset: 00H R/W
Symbol
<7>
6 5 4 3 2 1 0
CSIM11 CSIE11 TRMD11 SSE11 DIR11
0
0
0
CSOT11
CSIE11
Operation control in 3-wire serial I/O mode
0
Disables
operation
Note 1
and asynchronously resets the internal circuit
Note 2
.
Notes 1.
To use P02/SO11, P04/SCK11, and P05/SSI11/TI001 as general-purpose ports, set CSIM11 in
the default status (00H).
2.
Bit 0 (CSOT11) of CSIM11 and serial I/O shift register 11 (SIO11) are reset.
Содержание 78K/0 Series
Страница 2: ...Preliminary User s Manual U17260EJ3V1UD 2 MEMO ...
Страница 10: ......
Страница 53: ...CHAPTER 3 CPU ARCHITECTURE Preliminary User s Manual U17260EJ3V1UD 53 Figure 3 6 Memory Map µPD78F0536 ...
Страница 120: ......