UPD78F0138 NEC, UPD78F0138 Datasheet - Page 156

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

156
Note The one-shot pulse output mode operates correctly only in the free-running mode and the mode in which
Cautions 1. Timer operation must be stopped before setting other than TOC014.
Address: FFB9H
Symbol
TOC01
clear & start occurs at the TI001 valid edge. In the mode in which clear & start occurs on a match between
the TM01 register and CR001 register, one-shot pulse output is not possible because an overflow does not
occur.
2. If LVS01 and LVR01 are read, 0 is read.
3. OSPT01 is automatically cleared after data is set, so 0 is read.
4. Do not set OSPT01 to 1 other than in one-shot pulse output mode.
5. A write interval of two cycles or more of the count clock selected by prescaler mode register
6. Do not set LVS01 to 1 before TOE01, and do not set LVS01 and TOE01 to 1 simultaneously.
01 (PRM01) is required to write to OSPT01 successively.
OSPT01
OSPE01
TOC014
TOC011
TOE01
LVS01
Figure 6-11. Format of 16-Bit Timer Output Control Register 01 (TOC01)
7
0
0
1
0
1
0
1
0
0
1
1
0
1
0
1
After reset: 00H
CHAPTER 6 16-BIT TIMER/EVENT COUNTERS 00 AND 01
No one-shot pulse trigger
One-shot pulse trigger
Successive pulse output mode
One-shot pulse output mode
Disables inversion operation
Enables inversion operation
Disables inversion operation
Enables inversion operation
Disables output (output fixed to level 0)
Enables output
OSPT01
LVR01
<6>
0
1
0
1
R/W
No change
Timer output F/F reset (0)
Timer output F/F set (1)
Setting prohibited
OSPE01
<5>
Timer output F/F control using match of CR011 and TM01
Timer output F/F control using match of CR001 and TM01
User’s Manual U16228EJ2V0UD
One-shot pulse output trigger control via software
One-shot pulse output operation control
TOC014
Note
4
Timer output control
Timer output F/F status setting
LVS01
<3>
LVR01
<2>
TOC011
1
TOE01
<0>