UPD780828A Datasheet, PDF (130/472 Pages) NEC – 8-bit Single-Chip Microcontroller

Chapter 7 8-Bit Timer/Event Counters 50 and 51
Figure 7-2: 8-Bit Timer/Event Counter 51 Block Diagram
TI51/P91/S22
fX/2⁴
fX/2⁶
fX/2⁷
fX/2⁸
fX/2¹⁰
fX/2¹²
8-Bit Compare
Register 51
(CR51)
Match
8-Bit Counter 51 OVF
(TM51)
Clear
3
Selector
Internal Bus
Selector
INTTM51
SQ
INV
R
S
Level
Inversion
R
TIO51/P91/S22
TCL512 TCL511 TCL510
Timer Clock Select
Register 51 (TCL51)
TCE51 TMC516 TMC514 LVS51 LVR51 TMC511 TOE51
Timer Mode Control
Register 51 (TMC51)
Internal Bus
Note: Refer to Figure 7-3 for details of configurations of 8-bit timer/event counters 50 and 51 output
control circuits.
Figure 7-3: Block Diagram of 8-Bit Timer/Event Counters 50 and 51 Output Control Circuit
TMCn1
TMCn6
RESET
LVRn
LVSn
TMCn1
TMCn6
INTTMn
TCEn
INTTMn
OVFn
R
Q
S
INV
PWM Output Circuit
Timer Output F/F2
R
Q
S
Level
F/F
TO50/P34/S27/TI50,
TO51/P91/S22/TI51
P34, P91
Output Latch
PM34,
PM91
TOEn
Remarks: 1. The section in the broken line is an output control circuit.
2. n = 50, 51
130
User’s Manual U16504EE1V1UD00