diff --git a/board_configs/busdisplay/i80/ili9341_i80_rp2040/board_config.py b/board_configs/busdisplay/i80/ili9341_i80_rp2040/board_config.py
index e5eea308..4b9110cc 100644
--- a/board_configs/busdisplay/i80/ili9341_i80_rp2040/board_config.py
+++ b/board_configs/busdisplay/i80/ili9341_i80_rp2040/board_config.py
@@ -34,7 +34,7 @@
     power_pin=None,
     power_on_high=True,
 )
-i2c = I2C(0, sda=Pin(16), scl=Pin(17), frequency=100_000)
+i2c = I2C(0, sda=Pin(16), scl=Pin(17), freq=100_000)
 touch = FT6x36(i2c)
 touch_rotation_table = None
 
diff --git a/board_configs/busdisplay/i80/wt32sc01-plus/board_config.py b/board_configs/busdisplay/i80/wt32sc01-plus/board_config.py
index fce80bdb..187b615c 100644
--- a/board_configs/busdisplay/i80/wt32sc01-plus/board_config.py
+++ b/board_configs/busdisplay/i80/wt32sc01-plus/board_config.py
@@ -13,11 +13,17 @@
 #    ST7796(reset=4)
 reset = Pin(4, Pin.OUT, value=1)
 
+# Pins from the board's datasheet (Panlee ZX3D50CE02S-USRC-4832, Tab. 5). The
+# LCD has no chip-select line; GPIO 6 is the touch controller's SDA.
 display_bus = I80Bus(
     command=0,
-    chip_select=6,
+    chip_select=None,
     write=47,
     data_pins=[9, 46, 3, 8, 18, 17, 16, 15],
+    # 15 MHz, the ST7796's rated write cycle (66 ns). Proven on the glass
+    # 2026-10-05: at the bus's 30 MHz default the panel showed noise, and at
+    # 20 MHz LVGL's updates landed on the wrong rows.
+    frequency=15_000_000,
 )
 
 display_drv = ST7796(
@@ -40,7 +46,7 @@
     power_pin=None,
     power_on_high=True,
 )
-i2c = I2C(0, sda=Pin(6), scl=Pin(5), frequency=100_000)
+i2c = I2C(0, sda=Pin(6), scl=Pin(5), freq=100_000)
 touch = FT6x36(i2c)
 touch_rotation_table = None
 
diff --git a/board_configs/busdisplay/i80/wt32sc01-plus/board_peripherals.py b/board_configs/busdisplay/i80/wt32sc01-plus/board_peripherals.py
index 4b40c246..976e70f5 100644
--- a/board_configs/busdisplay/i80/wt32sc01-plus/board_peripherals.py
+++ b/board_configs/busdisplay/i80/wt32sc01-plus/board_peripherals.py
@@ -10,12 +10,12 @@ def load_peripherals(ns):
 
 
 def sdcard():
-    """SPI microSD when present (CS=GPIO41 common on WT32-SC01 Plus)."""
+    """The microSD slot over SPI (datasheet Tab. 4: CS 41, MOSI 40, CLK 39, MISO 38)."""
     from machine import Pin, SoftSPI
 
     from sdcard import SDCard
 
-    spi = SoftSPI(baudrate=1_000_000, sck=Pin(12), mosi=Pin(11), miso=Pin(13))
+    spi = SoftSPI(baudrate=1_000_000, sck=Pin(39), mosi=Pin(40), miso=Pin(38))
     return SDCard(spi, Pin(41, Pin.OUT, value=1))