upd17225 Renesas Electronics Corporation., upd17225 Datasheet - Page 37

• Manufacturer Part Number: upd17225
• Description: 4-bit Single-chip Microcontroller For Small General-purpose Infrared Remote Control Transmitter
• Manufacturer: Renesas Electronics Corporation.

6.
6.1
for the basic interval timer is f
6.2
The frequency for the interrupt signal, output by the basic interval timer, is selected by BTMMD, and the watchdog timer
is reset by WDTRES.
The basic interval timer has a function to generate the interval timer interrupt signal and watchdog timer reset signal.
The system clock (f
The basic interval timer is controlled by the bits on the register file. That is, the basic interval timer is reset by BTMRES.
System
clock f
BASIC INTERVAL TIMER/WATCHDOG TIMER
Source Clock for Basic Interval Timer
Controlling Basic Interval Timer
X
divider
1/2
X
) is divided, to generate the source clock for the basic interval timer. The input clock frequency
7
X
/2
7
Figure 6-1. Basic Interval Timer Configuration
. When the CPU is set in the STOP mode, the basic interval timer also stops.
BTMRES
divider
1/2
Data Sheet U12643EJ2V0DS00
11
divider
1/2
PD17225, 17226, 17227, 17228
divider
1/2
WDTRES
f /2
f /2
X
X
divider
1/2
18
20
BTMCK
IRQBTM
WDOUT
37