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--- builderpages:plasmo:rr512k:rr512k_rev1 [2020/10/26 08:02]
plasmo
+++ builderpages:plasmo:rr512k:rr512k_rev1 [2020/12/12 10:11] (current)
plasmo
@@ Line 26: / Line 26: @@
 Bill of Materials
+[[:builderpages:plasmo:rr512k:rr512k_rev1:ec_i2c|Engineering change]] to enable I2C interface and CTS handshake
 ==== Software ====
@@ Line 35: / Line 37: @@
 ==== Jumper Configuration ====
-{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/rr512k/rr512k_rev1/rr512k_r1_jumpers.jpg?direct&400x256}}
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=af47cd&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/rr512k/rr512k_rev1/rr512k_r1_jumpers.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/rr512k/rr512k_rev1/rr512k_r1_jumpers.jpg?direct&400x256|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_rr512k_rr512k_rev1_rr512k_r1_jumpers.jpg}}]]
 ===== Applications =====
@@ Line 71: / Line 73: @@
 Programming is completed when 'X' is output. It takes about 2 minutes to program 512K EPROM.
+==== I2C Interface ====
+[[:builderpages:plasmo:rr512k:rr512k_rev1:ec_i2c|Engineering change]] to add 4-pin I2C connector to interface to 128×64 OLED display
 ===== To Do =====
@@ Line 76: / Line 82: @@
 Developing additional functions in CPLD utilizing the spare I/O pins:
-  * I2C, especially for 128×64 OLED display
   * SPI
   * WB2812B interface to drive array of RGB LEDs