參數資料
型號: IE-V850ES-G1
英文描述: IE-V850ES-G1 User's Manual | User's Manual[03/2003]
中文描述: IE瀏覽器- V850ES - G1期用戶手冊|用戶手冊[03/2003]
文件頁數: 27/48頁
文件大小: 628K
代理商: IE-V850ES-G1
CHAPTER 3 NOTES ON TARGET SYSTEM DESIGN
User
s Manual U16647EJ1V0UM
27
Figure 3-7. FLMD0 Pin Connection Example <2>
FLMD0
IE-V850E1-CD-NW
Target device
Target system
FLMD0
PORT
3.2.8
RESET
This is the system reset input signal. If the DRST pin of target device is an alternate-function pin, DRST can be
enabled/disabled by the value of the OCDM0 bit in the device. Some devices have specifications such that the initial
status of the alternate-function pin varies according to the reset source, so that in the case of reset via the RESET
pin, DRST is enabled when OCDM0 = 1, and in the case of reset via POC (Power-On Clear function), DRST is
disabled when OCDM0 = 0.
In the case of a target system where only reset via POC is used in such a device, DRST cannot be enabled, and
therefore on-chip debugging cannot be performed. In such a case, the DRST pin is enabled by performing the
connection shown in Figure 3-8 and applying reset via the RESET pin from the IE-V850E1-CD-NW.
Figure 3-8. RESET Pin Connection Example
74LV125A
RESET
IE-V850E1-CD-NW
22
Target device
V
DD
Target system
V
DD
RESET
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