UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 191

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

9.2 Configuration of 8-Bit Timer/Event Counters 50, 51
(1) 8-bit timer counter 5n (TM5n: n = 0, 1)
8-bit timer/event counters 50, 51 consist of the following hardware.
<1> RESET input
<2> When TCE5n is cleared
<3> When TM5n and CR5n match in the clear & start mode entered on a match between TM5n and CR5n.
Note An error may occur in the count. Select a count clock that has a high/low level longer than two cycles
Caution
TM5n is an 8-bit read-only register that counts the count pulses.
The counter is incremented in synchronization with the rising edge of the count clock.
When TM50 and TM51 can be connected in cascade and used as a 16-bit timer, they can be read by a 16-bit
memory manipulation instruction. However, since they are connected by an internal 8-bit bus, TM50 and TM51
are read separately twice in that order. Thus, take reading during the count change into consideration and
compare them by reading twice.
When the count value is read during operation, the count clock input is temporarily stopped
value is read.
In the following situations, count value is set to 00H.
Remark n = 0, 1
of the CPU clock.
Address: FF12H (TM50), FF13H (TM51)
(n = 0, 1)
Symbol
TM5n
In cascade connection mode, the count value is reset to 0000H when TCE50 of the lowest timer
is cleared.
Timer counter
Register
Timer input
Timer output
Control registers
Table 9-1. Configuration of 8-Bit Timer/Event Counters 50, 51
Item
Figure 9-3. Format of 8-Bit Timer Counter 5n (TM5n)
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 50, 51
8-bit timer counter 5n (TM5n)
8-bit timer compare register 5n (CR5n)
TI5n
TO5n
Timer clock select register 5n (TCL5n)
8-bit timer mode control register 5n (TMC5n)
Port mode register 7 (PM7)
Port register 7 (P7)
User’s Manual U14260EJ4V0UD
After reset: 00H
Configuration
R
Note
, and then the count
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