Siflower SF21H8898 specifications:

Cache
32KB L1 I-Cache and 32KB L1 D-Cache per core
Shared 256 KB L2 cache
Memory – Up to 2GB 16-bit DDR3/3L up to 2133Mbps or DDR4 up to 2666Mbps
Storage – NAND and NOR SPI flash support
Networking
1x QSGMII interface (Serdes 5Gbps rate) for 4x external Gigabit Ethernet PHYs
1x SGMII/HSGMII interface (Serdes1.25/3.125Gbps rate) supporting Gigabit and 2.5Gbps modes
1x RGMII interface for Gigabit Ethernet
1x MDIO interface
Hardware forwarding via NPU
IEEE802.3 Ethernet II protocols
Configurable jumbo frame length (9KB)
Port-based shaper and priority scheduling
IPv4, IPv6 packet parsing and forwarding based on ETHII, PPPoE, 802.3
VLAN-based layer 2 unicast and multicast forwarding
Hardware NAT forwarding
Basic NAT mode and Network address port translation(NAPT) mode, including full cone NAT, restricted cone NAT, port restricted cone NAT and symmetric NAT;
Source NAT (SNAT) and Destination NAT (DNAT)
Layer 3 routing
Flow classification ACL –  The policies after flow classification include upsending, forwarding, discarding, mirroring, redirecting, speed limiting and priority updating, etc.
Hardware QoS
Rich message traffic (number, number of bytes) statistics
USB – 1x USB 2.0
High-speed expansion – 2x PCIe 2.0
Low-speed I/Os – 2x UART, 2x SPI, 2x I2C, 2x 16-bit PWM, up to 41x GPIO
Debug interface – JTAG
Security
SHA, RSA, AES, MD5, etc.
Hardware-level Security boot
Misc – On-chip temperature detection with +/- 3°C accuracy
Power Management
0.8V, 1.8V, and 3.3V supplies
2x VDT voltage detection
Power-off detection and interrupt reporting
Package – 16x16mm FCCSP-390
Temperature Range – Operating: -40°C to +85°C; storage: -40°C to +125°C
Manufacturing Process – TSMC 12nm FFC