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Preliminary User's Manual l TQMLS1028A UM 0001 l © 2019, TQ-Systems GmbH
Page 7
4.1.2
LS1028A variants, details
The following table shows the features provided by the different variants.
Fields with a red background indicate differences; fields with a green background indicate compatibility.
Table 2:
LS1028A variants
Feature
LS1028A
LS1027A
LS1018A
LS1017A
ARM
®
core
2 × Cortex
®
-A72
2 × Cortex
®
-A72
1 × Cortex
®
-A72
1 × Cortex
®
-A72
DDR
32-bit, DDR4 + ECC
32-bit, DDR4 + ECC
32-bit, DDR4 + ECC
32-bit, DDR4 + ECC
GPU
1 × GC7000UltraLite
–
1 × GC7000UltraLite
–
Ethernet
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
PCIe
2 × Gen 3.0 Controllers
(RC or RP)
2 × Gen 3.0 Controllers
(RC or RP)
2 × Gen 3.0 Controllers
(RC or RP)
2 × Gen 3.0 Controllers
(RC or RP)
USB
2 × USB 3.0 with PHY
(Host or Device)
2 × USB 3.0 with PHY
(Host or Device)
2 × USB 3.0 with PHY
(Host or Device)
2 × USB 3.0 with PHY
(Host or Device)
4.2
Reset Logic and Supervisor
The reset logic contains the following functions:
•
Monitoring the voltages on the module
•
External reset input
•
PGOOD output for power-up of circuits on the carrier board
•
Reset LED (Function: PORESET# low: LED lights up)
Table 3:
Reset- and Status signals on the TQMLS1028A
Signal
Source
Target
Remark
PORESET#
Supervisor, Board, JTAG,
System Controller
CPU
Signal is available externally with
3.3 V level as RESET_OUT#.
HRESET#
Supervisor, Board, JTAG,
System Controller
CPU, LED
1.8 V
RESET_REQ# CPU
Board
Internal feedback to supervisor, signal is available
externally with 3.3 V level as RESET_REQ_OUT#.
TRST#
JTAG
CPU
1.8 V
PGOOD
Supervisor
System Controller, Board
3.3 V
4.2.1
Supervisor
•
System cont serial voltage ref external comparators
•
PORESET# is connected to LED (pulse duration given by system controller)