DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 481
DF2398TE20
Manufacturer Part Number
DF2398TE20
Description
IC H8S MCU FLASH 256K 120TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of DF2398TE20
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
87
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
120-TQFP, 120-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
HD64F2398TE20
HD64F2398TE20
HD64F2398TE20
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2398TE20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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12.6.5
TCNT may increment erroneously when the internal clock is switched over. Table 12-5 shows the relationship between
the timing at which the internal clock is switched (by writing to the CKS1 and CKS0 bits) and the TCNT operation.
When the TCNT clock is generated from an internal clock, the falling edge of the internal clock pulse is detected. If clock
switching causes a change from high to low level, as shown in case 3 in table 12-5, a TCNT clock pulse is generated on
the assumption that the switchover is a falling edge. This increments TCNT.
The erroneous incrementation can also happen when switching between internal and external clocks.
Table 12-5 Switching of Internal Clock and TCNT Operation
Switching of Internal Clocks and TCNT Operation
No.
1
2
3
Timing of Switchover
by Means of CKS1
and CKS0 Bits
Switching from
low to low*
Switching from
low to high*
Switching from
high to low*
1
2
3
TCNT Clock Operation
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
Clock before
switchover
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
Clock after
switchover
TCNT clock
TCNT
N
N
N
CKS bit write
CKS bit write
N+1
N+1
CKS bit write
Rev.6.00 Oct.28.2004 page 451 of 1016
N+1
*
4
N+2
N+2
REJ09B0138-0600H
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