diff --git a/README.md b/README.md
index ef9449e..b4eeb3e 100644
--- a/README.md
+++ b/README.md
@@ -46,14 +46,14 @@ Supported devices. Microchip manufacture each chip in different variants with
 letters denoted by "xx" below. The variants cover parameters such as minimum
 Vcc value and do not affect the API.
 
-In the table below the Interface column includes page size in bytes.
-| Manufacurer | Part     | Interface | Bytes  | Technology | Docs   |
-|:-----------:|:--------:|:---------:|:------:|:----------:|:------:|
-| Microchip   | 25xx1024 | SPI 256   | 128KiB |   EEPROM   | [SPI.md](./spi/SPI.md) |
-| Microchip   | 24xx512  | I2C 128   |  64KiB |   EEPROM   | [I2C.md](./i2c/I2C.md) |
-| Microchip   | 24xx256  | I2C 128   |  32KiB |   EEPROM   | [I2C.md](./i2c/I2C.md) |
-| Microchip   | 24xx128  | I2C 128   |  16KiB |   EEPROM   | [I2C.md](./i2c/I2C.md) |
-| Microchip   | 24xx64   | I2C 128   |   8KiB |   EEPROM   | [I2C.md](./i2c/I2C.md) |
+In the table below the Interface column includes page size in bytes.  
+| Manufacurer | Part     | Interface | Bytes  | Technology | Docs                      |
+|:-----------:|:--------:|:---------:|:------:|:----------:|:-------------------------:|
+| Microchip   | 25xx1024 | SPI 256   | 128KiB |   EEPROM   | [SPI.md](./spi/SPI.md)    |
+| Microchip   | 24xx512  | I2C 128   |  64KiB |   EEPROM   | [I2C.md](./i2c/I2C.md)    |
+| Microchip   | 24xx256  | I2C 128   |  32KiB |   EEPROM   | [I2C.md](./i2c/I2C.md)    |
+| Microchip   | 24xx128  | I2C 128   |  16KiB |   EEPROM   | [I2C.md](./i2c/I2C.md)    |
+| Microchip   | 24xx64   | I2C 128   |   8KiB |   EEPROM   | [I2C.md](./i2c/I2C.md)    |
 | Adafruit    | 1895     | I2C n/a   |  32KiB |   FRAM     | [FRAM.md](./fram/FRAM.md) |
 
 ## 1.4 Performance
diff --git a/spi/SPI.md b/spi/SPI.md
index 2113d89..d487045 100644
--- a/spi/SPI.md
+++ b/spi/SPI.md
@@ -25,12 +25,12 @@ as below. Pin numbers assume a PDIP package (8 pin plastic dual-in-line).
 |:-------:|:---:|:------:|
 | 1 CS    | Y5  | SS/    |
 | 2 SO    | Y7  | MISO   |
-| 3 WP/   | 3V3 |        |
-| 4 Vss   | Gnd |        |
+| 3 WP/   | 3V3 | 3V3    |
+| 4 Vss   | Gnd | Gnd    |
 | 5 SI    | Y8  | MOSI   |
 | 6 SCK   | Y6  | SCK    |
-| 7 HOLD/ | 3V3 |        |
-| 8 Vcc   | 3V3 |        |
+| 7 HOLD/ | 3V3 | 3V3    |
+| 8 Vcc   | 3V3 | 3V3    |
 
 For multiple chips a separate CS pin must be assigned to each chip: each one
 must be wired to a single chip's CS line. Multiple chips should have 3V3, Gnd,