UPD78F0138 NEC, UPD78F0138 Datasheet - Page 187

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

7.1 Functions of 8-Bit Timer/Event Counters 50 and 51
TI50/TO50/P17
8-bit timer/event counters 50 and 51 have the following functions.
• Interval timer
• External event counter
• Square-wave output
• PWM output
Figures 7-1 and 7-2 show the block diagrams of 8-bit timer/event counters 50 and 51.
Notes 1.
Timer clock selection
register 50 (TCL50)
TCL502 TCL501 TCL500
f
2.
X
f
f
f
X
X
X
f
/2
X
/2
/2
/2
/2
f
13
X
2
6
8
Timer output F/F
PWM output F/F
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
3
Figure 7-1. Block Diagram of 8-Bit Timer/Event Counter 50
8-bit timer
counter 50 (TM50)
8-bit timer compare
register 50 (CR50)
Selector
Match
Clear
OVF
8-bit timer mode control
register 50 (TMC50)
User’s Manual U16228EJ2V0UD
TCE50 TMC506 LVS50 LVR50 TMC501 TOE50
Internal bus
Internal bus
S
R
Selector
INV
S
R
Note 2
Note 1
Q
Invert
level
INTTM50
Output latch
To TMH0
To UART0
To UART6
(P17)
PM17
TO50/
TI50/P17
187