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2.8
Configuration
The Zynq 7Z045 Mini-Module Plus Development Board supports several methods of configuring
the 7Z045 PSoC. The possible configuration sources include Boundary-scan (JTAG cable), QSPI
and Micro SD card. The blue LED D1 labeled “DONE” on the baseboard illuminates to indicate
when the 7Z045 has been successfully configured.
2.8.1
Configuration Modes and Boot Settings
Upon power-up the 7Z045 will be enabled in a configuration mode defined by the position of
the switches on the five position slide switch “SW5”. JTAG device configuration can occur at
any time regardless of the configuration switch setting after power-on.
SW5 also controls the JTAG mode and whether the PS PLL is enabled or disabled.
SW5 position 0 controls the JTAG mode. The JTAG mode options are “cascaded” and
“independent”. In cascaded mode, the PS and the PL systems of the 7Z045 are included in the
JTAG chain while in independent mode only the PL system is included. While in independent
mode the ARM DAP is accessible but the user must use a separate JTAG cable via the 20-pin
PJTAG connector J5.
SW5 position 4 controls the PLL.
The following table shows the two configuration modes and settings and the proper SW5
position settings:
Table 15
– Setting the Configuration Mode “SW5”
2.8.2
JTAG Interface (PL TAP and ARM DAP)
The Zynq 7Z045 Mini-
Module Plus Development Board‘s JTAG interface originates at the
baseboard and is routed to the 7Z045 via the JX1 and JX2 connectors. A Xilinx parallel or USB
cable is required to configure the 7Z045 in JTAG mode. The JTAG connector is located on the
Mini-Module Plus Baseboard 2 and is referenced on the baseboard as J1. The 7Z045
PROGRAM_B signal is also sourced from the baseboard via push button SW4. The following
figure shows a block diagram of the JTAG interface.
Config Mode/Setting
SW5[0]
SW5[1]
SW5[2]
SW5[3]
SW5[4]
JTAG Cascaded
0
x
x
x
x
JTAG Independent
1
x
x
x
x
JTAG Config Mode
x
0
0
0
x
QSPI Config Mode
x
0
0
1
x
SD Card Config Mode
x
0
1
1
x
Disable PLL
x
x
x
x
0
Enable PLL
x
x
x
x
1