Driver - Sec S3c2443x Test B D
Demystifying the "Sec S3c2443x Test B D Driver": A Deep Dive into Legacy Samsung Hardware
# Create device node mknod /dev/testbd c 244 0
TESTBD_ENABLE_B: Activates Test Mode B (peripheral loopback)TESTBD_ENABLE_D: Activates Test Mode D (memory/clock stress)TESTBD_GET_STATUS: Returns test result flags (pass/fail per pin)TESTBD_SET_LOOPBACK: Which peripheral to loop (UART0, SPI0, I2C1)
Sec S3c2443x Test B D Driver
Test B typically includes:
- Core Frequency: Up to 533 MHz
- Memory Controller: SRAM, SDRAM, NOR/NAND flash support
- Display Controller: Up to 16M colors, supporting STN and TFT LCDs
- Peripheral Interfaces: I²C, I²S, SPI, SD/MMC, USB 1.1 Host/Device, UART, Camera Interface
- NAND Flash Controller: Steppingstone boot loader (4KB internal SRAM)
- Test & Debug Features: JTAG, boundary scan, and dedicated test modes