ADUC7020 JTAG 连接不上

我在使用JTAG仿真器尝试连接7020时,总是连接不上,以下 是SEGGER J-FLASH软件里面connect后提示的信息,正常情况下,RESET脚也不是必须连接的吧?,目前20PIN的JTAG里面就接了 TCK TDI TMS TDO VCC这几要线

- J-Link firmware: J-Link ARM V8 compiled Jan 31 2018 18:34:52
- Device "ADUC7020X62" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 1.061V
- TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
- RESET (pin 15) high, but should be low. Please check target hardware.
- TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
- Executing init sequence ...
- ERROR: Could not perform target reset
- ERROR: Failed to connect.
Could not perform custom init sequence.