HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 505

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Formula: When using a clock frequency not shown in tables 20.9 (1) and (2), follow the formula
below. The calculation is based on a clock frequency of 10 MHz.
After calculating a(f) and d(f) in the decimal system, omit the first decimal figures, and convert
them to the hexadecimal system, so that a(f) and d(f) are set to 15.8 s or less and 6.25 ms or less,
respectively.
After calculating b(f) and c(f) in the decimal system, raise the first decimal figures, and convert
them to the hexadecimal system, so that b(f) and c(f) are set to 4 s or more and 2 s or more,
respectively.
Examples for a program running in on-chip memory (RAM) at a clock frequency of 12 MHz:
Table 20.10
Clock Frequency [MHz]
10 MHz
2 MHz
a (f) =
b (f) =
c (f) =
d (f) =
frequency < 10 MHz
a (f) to d (f) =
frequency
Watchdog Timer Overflow Interval Settings (#e Setting Value According to
Clock Frequency)
12
10
12
10
12
10
12
10
16 MHz
3906 = 4687.2
Clock frequency f [MHz]
19
7
4
= 22.8
=
=
8.4
4.8
10
4687 = H'124F
22 = H'0016
Variable
e (f)
H'A57F
H'A57E
9
5
= H'09
= H'05
a (f = 10) to d (f = 10)
473