Equinox Systems ISP juno, Руководство пользователя

Страница: 40 / 60

ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20 39
11 Programmer I/O4 I/O
•
JTAG – TMS This pin is used for JTAG Target
Systems only.
12 Programmer I/O3 I/O
•
JTAG – TCK
•
SPI - SCK
This pin can be used for JTAG or
SPI Target Systems.
13 Programmer I/O2 I/O
•
JTAG – TDO
•
SPI – MISO
•
UART – RXD
•
PDI_RXD
This pin can be used for JTAG,
SPI, UART, XMEGA PDI and
ATtiny TPI Target Systems.
14 Programmer I/O1 I/O
•
JTAG – TDI
•
SPI – MOSI
•
UART - TXD
This pin can be used for JTAG, SPI
or UART Target Systems.
15 PROG_VPP P See note Vpp Voltage
The programmer can output a
“Vpp” voltage on this pin between
6.5V and 13.8V. This pin should not
be connected unless a Vpp voltage
is required by the Target IC.
16 PROG_RESET O RESET Target RESET control pin
This pin controls the Target Device
RESET pin. It will driven
HIGH/LOW according to the device
type and settings in the <Pre-
program State Machine> tab in the
EQtools project.
Key
O - Output from programmer to Target Device
I - Input to programmer from Target Device
P - Passive e.g. GROUND and power rails
N/C - Not connected
Please note:
Signal GROUND (0V)
The ‘Signal GROUND (0V)’ connection is the 0V to which the programming lines (JTAG, SPI, I2C,
UART, PDI, TPI) are referenced to. This 0V line should be connected directly to the Target System
(UUT) 0V connection via the shortest possible wire link.
Target Vcc
The ‘Target Vcc’ is the output of the ‘Controlled Power Supply’ from the programmer. The power
supply has a range of 1.8 to 5.0V and can be switched ON / OFF to the Target System under
programmer control.
External Target Vcc
The ‘External Target Vcc’ is the voltage which is applied to the ‘DC EXT’ connector of the
programmer. It is electronically switched to pins 3+4 inside the programmer. This allows an external
voltage from 1.8 – 24.0V to be switched to the Target System.