EDOSK2674 Renesas Electronics America, EDOSK2674 Datasheet - Page 18

• Manufacturer Part Number: EDOSK2674
• Description: DEV EVALUATION KIT H8S/2674
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of EDOSK2674

• Contents: EDOSK (Evaluation Development Operating System Kit) Board
• For Use With/related Products: H8S/2674R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The user may replace the HC49/U surface mounted AT cut crystal with another of similar type within the operating frequency
of the MCU device. Please refer to the hardware manual for the MCU for the valid operating range.
Another crystal is provided at 16 x 115200 (1.8432MHz). This crystal output is fed directly into the SCK2 pin of the MCU
allowing, with correct register settings, a fixed serial baud rate of 115200bps with zero errors.
The user may wish to ignore the serial clock oscillator input and use the system clock for baud rate generation – register
settings will need to be amended as per the following example.
Example:
The following table shows the baud rates and Baud Rate Register (BRR) setting required for each communication rate using
the operating speed of 33.0000MHz (default). Note that there are no zero error percentages.
4.5. R
Analogue and reference voltages to the MCU are, as default, isolated from the Auxiliary I/O connector by not fitted 0805
resistors. To make this connection the following resistors must be removed and re-soldered or replaced in the alternative
positions detailed below:
Care must be taken not to damage the tracking around these components. Only use soldering equipment designed for
surface mount assembly and rework.
4.6. A
The addition of a 0 resistor fitted in position R37 will permanently deactivate the Main Flash. This is to be used when CS0n
and/or CS1n are to be used by an Expansion Board.
SMR Setting:
Comm.
115200
19200
38400
57600
Baud
1200
2400
4800
9600
110
300
EMOVABLE COMPONENT INFORMATION
DDITIONAL COMPONENT INFORMATION
Baud Rate Register Settings for Serial Communication Rates using 33.0000MHz system clock
setting
Invalid
Invalid
Invalid
Invalid
BRR
H8/2674R pin
AVCC (pin 122)
AVSS (pin 131)
VREF (pin 121)
214
106
53
26
17
8
0
ERR (%)
Invalid
Invalid
Invalid
Invalid
0.07
0.39
0.54
0.54
0.54
0.54
T
ABLE
setting
Invalid
Invalid
4-1 C
BRR
Remove
R25
R7
R11
RYSTAL
.
.
214
106
53
26
12
6
3
1
1
F
REQUENCIES FOR
ERR (%)
Invalid
Invalid
11.90
11.90
0.07
0.39
0.54
0.54
3.29
4.09
Fit
R9
R8
R10
RS232
setting
Invalid
BRR
COMMUNICATION
Resistor Value
0
0
0
214
53
26
12
6
2
1
0
0
2
ERR (%)
Invalid
11.90
16.08
11.90
44.05
0.07
0.54
0.54
3.29
4.09
setting
Invalid
Invalid
Invalid
BRR
145
53
12
6
2
1
0
3
ERR (%)
Invalid
Invalid
Invalid
11.90
16.08
16.08
0.33
0.54
3.29
4.09
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