IE-78044-R-EM Renesas Electronics America, IE-78044-R-EM Datasheet - Page 33

• Manufacturer Part Number: IE-78044-R-EM
• Description: BOARD EMULATOR 78K0 UPD7804X
• Manufacturer: Renesas Electronics America

Specifications of IE-78044-R-EM

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

This chapter describes how to set the clock.
4.1 Outline of Clock Setting
circuit of the target device. Fig. 4-1 (a) shows an external circuit. The oscillator mounted on the target system is not
used for emulation. Instead, the clock mounted on the break board installed in the IE-78000-R is used.
device from an external source, and the internal oscillator circuit of the target device is not used. Fig. 4-1 (b) shows the
external circuit.
The main system clock can be selected from any of the following for debugging.
The subsystem clock can only be selected from (2) and (3).
(1) Clock already mounted on the break board
(2) Clock mounted by user
(3) External clock
If the target system is provided with an internal clock, select (1) or (2), above. The internal clock is the internal oscillator
If the target system is provided with an external clock, select (3). The external clock is supplied from to the target
Caution: An oscillator for a subsystem clock is not mounted on the break board.
To use the subsystem clock either mount an oscillator to the break board or use an external clock.
(a) Internal clock
Fig. 4-1 External Circuits of System Clock Oscillator Circuit
X2 or XT2
X1 or XT1
Target device
CHAPTER 4 SETTING CLOCK
Extermal
clock
(b) External clock
X2 or XT2
X1 or XT1
Target device
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