NEC 78K0 User Manual page 312

(5) SO10 output
The status of the SO10 output is as follows if bit 7 (CSIE10) of serial operation mode register 10 (CSIM10) is
cleared to 0.
TRMD10
Note
TRMD10 = 0
TRMD10 = 1
Note Status after reset
Caution If a value is written to TRMD10, DAP10, and DIR10, the output value of SO10 changes.
312
CHAPTER 14 SERIAL INTERFACE CSI10
Table 14-3. SO10 Output Status
DAP10
−
DAP10 = 0
DAP10 = 1 DIR10 = 0
DIR10 = 1
User's Manual U16227EJ2V0UD
DIR10 SO10 Output
−
Outputs low level
−
Value of SO10 latch
(low-level output)
Value of bit 7 of SOTB10
Value of bit 0 of SOTB10
Note
.