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MB2147-20-E

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9
■ Clock supply
Clock is supplied to the evaluation MCU.
Figure 10 shows how to mount a crystal oscillator unit in an IC socket (SC2) on the adapter board.
Figure 11 shows the clock peripheral circuit configuration. Figure 12 shows examples of sub clock
setting jumper settings. Table 3 lists the settings of the main clock switch. Table 4 lists the settings
of the sub clock switch.
Figure 10 Mounting a crystal oscillator unit
Note : For a capacitor that is mounted with the oscillator, use a capacitor about 10pF smaller than the recom-
mended value of the oscillator.
When a capacitor of the recommended value of the oscillator is mounted, an oscillator stabilization time
becomes longer than the standard time due to the parasitic capacitance of a socket and the influence
of an interconnect load and that may cause a failure such as instability of clock switching operation etc.
Figure 11 Clock peripheral circuit configuration
MAIN
SC2
XTAL
MAIN XTAL
8
7
6
5
1
2
3
4
GNDGND
32.768 kHz
390 kΩ
33 pF/50 V 10 pF/50 V
GND GND
X1
X0
PA2/X1A
X0AN100
PA1/X0A
X1
X0
PA2/X1A
PA1/X0A
1
2
3
4
140
200
267
217
93
5
6
7
8
FC SEL
X0A
X1A
SUB XTAL
CBA
Evaluation MCU
10
Figure 12 Examples of sub clock setting jumper settings
Table 3 Settings of the main clock switch
Table 4 Settings of the sub clock switch
*1 : Oscillation with a crystal unit mounted on the user system is not supported.
*2 : The correspondence between the number of the evaluation MCU pins and the sub clock signal (X0A, X1A) varies
depending on the evaluation MCU used. Note that the correct pins must be used for the setting.
Contact the sales or support representative for number of the evaluation MCU pin that provides the sub clock signal.
Note : To supply the main clock from the user system, add an oscillator to the user system and have the main
clock supplied after buffering using COMS or another type of buffer.
Main clock supply source
Setting of FC SEL (SW3)
12
Clock area OFF OFF
User system ON ON
Sub clock
Setting of
FC SEL
(SW3)
Setting of SUB XTAL (S2)
Availability
Supply
source*
1
Corresponding pin on
the evaluation MCU*
2
34
Available
Clock
area
X1A: Pin 267
X0A: Pin 217
OFF OFF
X1A:B-X1A:C connected
Figure 12 (a)
X0A:B-X0A:C connected
Figure 12 (a)
X1A: Pin 217
X0A: Pin 267
OFF OFF
X1A:B-X0A:B connected
Figure 12 (b)
X1A:C-X0A:C connected
Figure 12(b)
Not
available
-ONON
X1A:A-X1A:B connected
Figure 12 (c)
X0A:A-X0A:B connected
Figure 12 (c)
(a) (b) (c)
X1A
X0A
SUB XTAL
A
S2
X1A
X0A
SUB XTAL
A
S2
X1A
X0A
SUB XTAL
ABBB CCC
S2
11
■ Setting of the emulator-dedicated power supply
Using the emulator-dedicated power supply setting jumper on the adapter board, set the tool interface
power supply on the evaluation MCU to operate with the user power supply (UV
CC1) or the devel-
opment tool power supply (+5 V).
On an evaluation MCU that has an emulator-dedicated power supply, the development tool power
supply must supply power to the evaluation MCU as a tool interface power supply.
For an evaluation MCU that has an emulator-dedicated power supply, set the development tool power
supply (+5 V). For an evaluation MCU that does not have a emulator-dedicated power supply, set the
user power supply (UV
CC1).
For details on an evaluation MCU with a emulator-dedicated power supply, see the Evaluation MCU
hardware manual of the relevant product, or contact the sales or support representative.
Figure 13 shows the emulator-dedicated power supply setting jumper. Table 5 lists the settings of the
jumper.
Figure 13 Emulator-dedicated power supply setting jumper
Table 5 Settings of the emulator-dedicated power supply setting jumper
Emulator-dedicated power supply pin Setting of VCC SEL (S1)
Available TOOL VCC: B-C connected (+5 V)
Not available TOOL VCC: A-B connected (UV
CC1)
VCC SELS1
CB A
TOOL VCC
*
1
P0V
*
2
P1V
*
3
*1 : Emulator-dedicated power supply setting jumper
*2 : Power supply setting jumper of user port 0 (For details, see "■ User port pow-
er supply setting".)
*3 : Power supply setting jumper of user port 1 (For details, see "■ User port pow-
er supply setting".)
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MB2147-20-E

Mfr. #:
Buy MB2147-20-E
Manufacturer:
Cypress Semiconductor
Description:
TOOL KIT
Lifecycle:
New from this manufacturer.
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