Digilent Arty A7-100T vs Arty Z7

Digilent Arty A7-100T vs Arty Z7 (Zynq-7000 Z7020)

1. Programmable Logic & FPGA Fabric

Feature	Arty A7-100T	Arty Z7-20
FPGA Device	Artix-7 XC7A100T	Zynq-7000 XC7Z020 (PL)
Logic Cells	~101,440	~85,000
LUTs	~15,850	Included
Block RAM	~4,860 kbit	~4.9 Mbit
DSP Slices	240	220
PLLs / Clock Managers	6	4
On-chip ADC	XADC	XADC

2. Processor & Memory

Feature	Arty A7-100T	Arty Z7-20
CPU	None	Dual ARM Cortex-A9
DDR RAM	256 MB	512 MB
Flash	16 MB	16 MB
microSD	No	Yes

3. Connectivity & Multimedia

Feature	Arty A7-100T	Arty Z7-20
Ethernet	10/100 Mbps	Gigabit
USB	USB-UART, JTAG	USB-UART, JTAG, USB-OTG
HDMI	No	HDMI In + Out
Audio	No	Audio out

4. GPIO & Expansion

Feature	Arty A7-100T	Arty Z7-20
Pmod Ports	4	2
Arduino Header	Yes	Yes (more pins)
Analog Inputs	XADC	XADC + Arduino analog

5. User I/O

Feature	Arty A7-100T	Arty Z7-20
LEDs	4 + 4 RGB	4 + 2 RGB
Buttons	4	4
Switches	4	2

6. Toolchain & OS Support

Feature	Arty A7-100T	Arty Z7-20
FPGA Tools	Vivado	Vivado
Software Tools	MicroBlaze SDK	Vitis, Linux, PetaLinux
OS Support	Bare-metal	Linux, RTOS

7. Target Use

Board	Best Use
Arty A7-100T	FPGA, DSP, custom digital logic
Arty Z7-20	Embedded Linux, video, networking, heterogeneous computing

FPGA-Centric Comparison: Arty A7-100T vs Arty Z7-20

In this view, green cells highlight the board that is **better for pure FPGA, DSP, and digital logic workloads**.

1. FPGA Fabric & Compute Resources

Feature	Arty A7-100T	Arty Z7-20
FPGA Device	Artix-7 XC7A100T	Zynq-7000 XC7Z020 (PL)
Logic Cells	~101,440	~85,000
LUTs	~15,850	(fewer, implied)
Block RAM	~4,860 kbit	~4.9 Mbit
DSP Slices	240	220
Clock Managers (PLL/MMCM)	6	4
Max FPGA Focus	100% FPGA	Shared with ARM subsystem

2. Determinism & Real-Time Logic

Feature	Arty A7-100T	Arty Z7-20
CPU Interference	None (pure fabric)	ARM can steal bandwidth
Real-time latency	Fully deterministic	PS ↔ PL introduces jitter
Clocking simplicity	Single FPGA domain	Multiple clock & reset domains
I/O timing control	Direct FPGA pins	Routed through PS/AXI

3. Memory Architecture

Feature	Arty A7-100T	Arty Z7-20
DDR Access	Direct FPGA control	Through ARM memory controller
Memory Latency	Lower for PL	Higher via AXI/PS
DMA Complexity	Simpler	More complex (AXI HP ports)

4. DSP & Streaming Workloads

Feature	Arty A7-100T	Arty Z7-20
DSP Throughput	More DSP slices	Fewer DSP slices
FIR/FFT pipelines	Larger, deeper	Slightly smaller
High-speed streaming	No OS interference	Linux/RTOS can interfere
RF / SDR suitability	Excellent	Good but ARM overhead

5. Expansion & Raw I/O

Feature	Arty A7-100T	Arty Z7-20
Pmod ports	4	2
FPGA-routed pins	More	Some reserved for PS
High-speed digital I/O	More flexibility	More shared

6. Development Simplicity

Feature	Arty A7-100T	Arty Z7-20
Toolchain complexity	Vivado only	Vivado + Vitis + Linux
Debugging	Pure hardware	HW + OS + drivers
Bitstream boot	Instant	FSBL + ARM boot

7. Best Use Case

Board	Best Use
Arty A7-100T	DSP, SDR, digital logic, FPGA acceleration, real-time pipelines
Arty Z7-20	Embedded Linux + hardware acceleration