Ls1028A Variants, Details; Reset Logic And Supervisor; Supervisor - TQ-Systems TQMLS1028A Preliminary User's Manual

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
ARM ® core 2 × Cortex ®
DDR 32-bit, DDR4 + ECC
GPU 1 × GC7000UltraLite
4 × 2.5 G/1 G switched Eth
(TSN enabled)
Ethernet 1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
2 × Gen 3.0 Controllers
PCIe
(RC or RP)
2 × USB 3.0 with PHY
USB
(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
Supervisor, Board, JTAG,
PORESET#
System Controller
Supervisor, Board, JTAG,
HRESET#
System Controller
RESET_REQ# CPU
TRST# JTAG
PGOOD

Supervisor

4.2.1 Supervisor
• System controller + serial voltage reference + external comparators
• PORESET# is connected to LED (pulse duration given by system controller)
Preliminary User's Manual l TQMLS1028A UM 0001 l © 2019, TQ-Systems GmbH
-A72 2 × Cortex
32-bit, DDR4 + ECC
–
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
2 × Gen 3.0 Controllers
(RC or RP)
2 × USB 3.0 with PHY
(Host or Device)
CPU
CPU, LED
Board
CPU
System Controller, Board
LS1027A
® -A72 1 × Cortex
32-bit, DDR4 + ECC
1 × GC7000UltraLite
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
2 × Gen 3.0 Controllers
(RC or RP)
2 × USB 3.0 with PHY
(Host or Device)
Target
Signal is available externally with
3.3 V level as RESET_OUT#.
1.8 V
Internal feedback to supervisor, signal is available
externally with 3.3 V level as RESET_REQ_OUT#.
1.8 V
3.3 V
LS1018A
® -A72 1 × Cortex
32-bit, DDR4 + ECC
–
4 × 2.5 G/1 G switched Eth
(TSN enabled)
1 × 2.5 G/1 G Eth
(TSN enabled)
1 × 1 G Eth
2 × Gen 3.0 Controllers
(RC or RP)
2 × USB 3.0 with PHY
(Host or Device)
Remark
Page 7
LS1017A
® -A72