HD6417729 HITACHI [Hitachi Semiconductor], HD6417729 Datasheet - Page 53

• Manufacturer Part Number: HD6417729
• Description: Hitachi Microcomputer Development Environment System
• Manufacturer: HITACHI [Hitachi Semiconductor]

3.4
The clocks which are used for data communications must be set up on the emulator before the
program is downloaded.
For details of the limitations on both clocks, refer to section 6.5.4, Notes on Using the JTAG
Clock (TCK) and AUD Clock (AUDCK). The following is a description of the procedure used to
set the clocks.
AUD clock
A clock used in acquiring AUD traces.
If its frequency is set too low, complete data may not be acquired during realtime tracing.
If the frequency is set too high, the upper limit for the device’s AUD clock may be exceeded.
The AUD clock is only needed for emulators that have an AUD trace function.
JTAG clock (TCK)
A communication clock for downloading data to the emulator except for acquiring AUD trace.
If its frequency is set too low, the speed of downloading will be lowered.
If its frequency is set too high, the upper limit for the device’s TCK clock may be exceeded.
Setting up the Emulator
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