D12312SVTEBL25 Renesas Electronics America, D12312SVTEBL25 Datasheet - Page 435
![IC H8S MCU ROMLESS 100-QFP](/photos/28/61/286108/100-tqfp_sml.jpg)
D12312SVTEBL25
Manufacturer Part Number
D12312SVTEBL25
Description
IC H8S MCU ROMLESS 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of D12312SVTEBL25
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
70
Program Memory Type
ROMless
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Other names
HD6412312SVTEBL25
HD6412312SVTEBL25
HD6412312SVTEBL25
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10.3
10.3.1
TCNT is incremented by input clock pulses (either internal or external).
Internal Clock: Three different internal clock signals (φ/8, φ/64, or φ/8192) divided from the
system clock (φ) can be selected, by setting bits CKS2 to CKS0 in TCR. Figure 10.2 shows the
count timing.
External Clock: Three incrementation methods can be selected by setting bits CKS2 to CKS0 in
TCR: at the rising edge, the falling edge, and both rising and falling edges.
Note that the external clock pulse width must be at least 1.5 states for incrementation at a single
edge, and at least 2.5 states for incrementation at both edges. The counter will not increment
correctly if the pulse width is less than these values.
Figure 10.3 shows the timing of incrementation at both edges of an external clock signal.
φ
Internal clock
Clock input
to TCNT
TCNT
Operation
TCNT Incrementation Timing
Figure 10.2 Count Timing for Internal Clock Input
N−1
N
Rev.7.00 Feb. 14, 2007 page 401 of 1108
Section 10 8-Bit Timers
REJ09B0089-0700
N+1
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