DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 804
DF2148RTE20IV
Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Specifications of DF2148RTE20IV
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
Host Interface, I²C, IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Section 25 Power-Down State
Using a Crystal Oscillator
Set bits STS2 to STS0 so that the standby time is at least 8 ms (the oscillation settling time).
Table 25.5 shows the standby times for different operating frequencies and settings of bits STS2 to
STS0.
Table 25.5 Oscillation Settling Time Settings
STS2 STS1 STS0 Standby Time
0
1
Note:
Using an External Clock
Any value can be set. Normally, use of the minimum time is recommended.
25.6.4
Figure 25.3 shows an example in which a transition is made to software standby mode at the
falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI
pin.
In this example, an NMI interrupt is accepted with the NMIEG bit in SYSCR cleared to 0 (falling
edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set
to 1, and a SLEEP instruction is executed, causing a transition to software standby mode.
Software standby mode is then cleared at the rising edge on the NMI pin.
Rev. 4.00 Sep 27, 2006 page 758 of 1130
REJ09B0327-0400
: Recommended time setting
0
1
0
1
* This setting must not be used in the flash memory version.
Software Standby Mode Application Example
0
1
0
1
0
1
0
1
8192 states
16384 states
32768 states
65536 states
131072 states 6.6
262144 states
Reserved
16 states *
20
MHz
0.41
0.82
1.6
3.3
—
0.8
13.1 16.4
0.51
1.0
2.0
4.1
16
MHz
—
1.0
8.2
12
MHz
0.65
1.3
2.7
5.5
21.8
—
1.3
10.9
10
MHz
0.8
1.6
3.3
6.6
26.2
—
1.6
13.1 16.4
8
MHz
1.0
2.0
4.1
32.8
—
2.0
8.2
6
MHz
1.3
2.7
5.5
21.8
43.6
—
2.7
10.9 16.4
4
MHz
2.0
4.1
32.8
65.6
—
4.0
8.2
2
MHz
4.1
16.4
32.8
65.5
131.2
—
8.0
8.2
Unit
ms
µs
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