DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 518

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 13 Smart Card Interface
13.3.5
Only an internal clock generated by the on-chip baud rate generator can be used as the
transmit/receive clock for the smart card interface. The bit rate is set with BRR and the CKS1 and
CKS0 bits in SMR. The formula for calculating the bit rate is as shown below. Table 13.5 shows
some sample bit rates.
If clock output is selected by setting CKE0 to 1, a clock with a frequency of 372 times the bit rate
is output from the SCK pin.
Where: N = Value set in BRR (0
Table 13.4 Correspondence between n and CKS1, CKS0
n
0
1
2
3
Table 13.5 Examples of Bit Rate B (bit/s) for Various BRR Settings (When n = 0)
N
0
1
2
Note: Bit rates are rounded to the nearest whole number.
Rev. 4.00 Feb 15, 2006 page 492 of 900
REJ09B0291-0400
B = Bit rate (bit/s)
n = See table 13.4
B =
Clock
= Operating frequency (MHz)
1488
CKS1
0
1
10.00
13441
6720
4480
2
2n–1
10.714
14400
7200
4800
(N + 1)
CKS0
0
1
0
1
N 255)
13.00
17473
8737
5824
10
6
14.285
19200
9600
6400
(MHz)
16.00
21505
10753
7168
18.00
24194
12097
8065
20.00
26882
13441
8961