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--- builderpages:plasmo:rr512k:rr512k_rev1 [2020/09/30 14:19]
plasmo
+++ builderpages:plasmo:rr512k:rr512k_rev1 [2020/12/12 10:11] (current)
plasmo
@@ Line 23: / Line 23: @@
 Gerber {{:builderpages:plasmo:rr512k:rr512k_rev1:rr512k_rev1_gerber.zip|photoplot}}
-{{:builderpages:plasmo:rr512k:rr512k_rev1:rr512k_rev1pcb_cpld_release_with_i2c.zip|CPLD equations }} <-updated CPLD with I2C interface
+{{:builderpages:plasmo:rr512k:rr512k_rev1:rr512k_rev1pcb_cpld_release_with_i2c.zip|CPLD equations }}  <-updated CPLD with I2C interface
 Bill of Materials
+[[:builderpages:plasmo:rr512k:rr512k_rev1:ec_i2c|Engineering change]] to enable I2C interface and CTS handshake
 ==== Software ====
@@ Line 32: / Line 34: @@
 {{:builderpages:plasmo:rr512k:rr512k_rev1:rrmon_v0_2_rr512k_rev1.zip|RRMon rev 0.2}}, this is separate monitor for this board loaded via serial bootstrap software. Its purpose is board diagnostic. The monitor is under development and subject to changes.
+==== Jumper Configuration ====
+[[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 67: / 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 72: / 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
@@ Line 82: / Line 91: @@
   * Move jumpers to more convenient locations
   * Add interface to I2C, SPI, and WB2812B
+  * optional reset supervisor