DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 804

• Manufacturer Part Number: DF2148ATE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148ATE20

• 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: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148ATE20; HD64F2148ATE20

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