FT4222h - Revision history

Rew: /* Jumper settings */

2020-11-17T19:12:31Z

Jumper settings

Rew: /* Jumper settings */

2019-11-14T08:53:03Z

Jumper settings

Rew at 08:47, 14 November 2019

2019-11-14T08:47:05Z

Rew: /* pinout */

2017-02-17T14:55:46Z

pinout

Rew: /* pinout */

2017-02-16T16:25:24Z

pinout

Rew: /* pinout */

2016-05-16T09:48:43Z

pinout

Cartridge1987 at 11:30, 2 November 2015

2015-11-02T11:30:32Z

Rew: /* pinout */

2015-03-10T08:50:46Z

pinout

Rew: /* Jumper settings */

2015-03-10T08:45:15Z

Jumper settings

Sjoerd: /* Jumper settings */

2015-03-09T16:47:00Z

Jumper settings

@@ Line 71: / Line 71: @@
 |-
 | 0
-| 0
+| 1
 | mode 1
 | 4
 |-
-| 0
+| 1
 | 0
 | mode 2
 | 4
 |-
-| 0
+| 1
-| 0
+| 1
 | mode 3
 | 1
 |}
 please refer to FTDI documentation about the available option in each of the modes.
 == Usage ==

@@ Line 85: / Line 85: @@
 | 1
 |}
+please refer to FTDI documentation about the available option in each of the modes.
+== Usage ==
+To use the board/chip, you can download the FT4222H library from FTDI's product page. It is available for Linux, Windows and Mac.
 == future hardware enhancements ==

@@ Line 16: / Line 16: @@
 See [[SPI connector pinout]] for the pinout of the SPI connectors.
-As you might expect, the two SPI connectors share the SCK, MISO and MOSI signals to the FT4222. The slave select on the two SPI connectors route to "SSO0" and "SS"
+As you might expect, the two SPI connectors share the SCK, MISO and MOSI signals to the FT4222H. The slave select on the two SPI connectors route to "SSO0" and "SS"
 On the I2C connector you can find the I2C signals SDA (pin 2)  and SCL (pin 3) as well as GND (pin 1) and VCC (pin 4). There is no pullup on the i2c lines on the board. You have to provide that externally.
-The power (VCC pin) on the I2C and SPI connectors can be jumper selected between 5V and 3V3. The 5V comes from the USB connection. It should be assumed to be limted to 500mA, whereas the 3.3V comes from the FT4222 itself. The datasheet does not specify how much current can be drawn. If you use this to power "slave" circuits, you must verify that you're not drawing too much yourself.
+The power (VCC pin) on the I2C and SPI connectors can be jumper selected between 5V and 3V3. The 5V comes from the USB connection. It should be assumed to be limted to 500mA, whereas the 3.3V comes from the FT4222H itself. The datasheet does not specify how much current can be drawn. If you use this to power "slave" circuits, you must verify that you're not drawing too much yourself. (Keep in mind that the 3.3V regulator inside the FT4222H is meant to power just the FT4222H. FTDI often specifies "not for external use" or "max 10mA", but I could not find that in THIS datasheet).
@@ Line 39: / Line 39: @@
 * 13 - +3.3V
 * 14 - +5V.
+On the SPI and I2C connectors there is a pin called "VCC". The voltage is selectable between 5V and 3.3V. Note that even if you
+select 5V, the io signals still go directly into the chip which is meant to work with 3.3V voltage levels. (the chip could also work with 1.8 or 2.5V IO signal levels, but on this board it is not configured like that).
 == LEDS ==
@@ Line 46: / Line 50: @@
 == Jumper settings ==
-The FT4222H chip provides a low-power 3.3V output voltage. You can chose to provide that 3.3V or the 5V from the USB on the SPI and I2C connectors. This is a solder jumper. We default the jumper to 5V with a small trace on the PCB.
+The FT4222H chip provides a low-power 3.3V output voltage. You can chose to provide that 3.3V or the 5V from the USB on the SPI and I2C connectors.
+In the picture here, the jumper to select between 3.3V and 5V is still a solder jumper. I've since found that I change such more often than is practical with a solder jumper, so I've decided to change it to a real jumper. When the jumper is 1-2, near the edge of the PCB, the VCC is configured 3.3V, and when the jumper is 2-3, near the middle of the PCB VCC is configured for 5V (from USB).
 The CNF jumpers allow you to configure the DNCFx signals on the FT4222H. Put the jumper near you (if the USB is on the left) for a 0 and away from you for a 1.
 DCNF1 is on the left, DCNF0 is on the right.
+{| class="wikitable"
+|-
+! DCNF1
+! DCNF0
+! mode
+! num interfaces
+|-
+| 0
+| 0
+| mode 0
+| 2
+|-
+| 0
+| 0
+| mode 1
+| 4
+|-
+| 0
+| 0
+| mode 2
+| 4
+|-
+| 0
+| 0
+| mode 3
+| 1
+|}
 == future hardware enhancements ==

@@ Line 25: / Line 25: @@
 The 14 pin connector at the top has the following pinout:
-- GND
+* 1 - GND
-- GND
+* 2 - GND
-- SCL
+* 3 - SCL
-- SDA
+* 4 - SDA
-- GPIO2
+* 5 - GPIO2
-GPIO3
+* 6 - GPIO3
-MOSI
+* 7 - MOSI
-MISO
+* 8 - MISO
-IO2
+* 9 - IO2
-IO3
+* 10 - IO3
-SCK
+* 11 - SCK
-SS0O
+* 12 - SS0O
-+3.3V
+* 13 - +3.3V
-+5V.
+* 14 - +5V.
 == LEDS ==

@@ Line 21: / Line 21: @@
 The power (VCC pin) on the I2C and SPI connectors can be jumper selected between 5V and 3V3. The 5V comes from the USB connection. It should be assumed to be limted to 500mA, whereas the 3.3V comes from the FT4222 itself. The datasheet does not specify how much current can be drawn. If you use this to power "slave" circuits, you must verify that you're not drawing too much yourself.
+The 14 pin connector at the top has the following pinout:
+- GND
+- GND
+- SCL
+- SDA
+- GPIO2
+GPIO3
+MOSI
+MISO
+IO2
+IO3
+SCK
+SS0O
++3.3V
++5V.
 == LEDS ==

@@ Line 1: / Line 1: @@
 [[File:FT4222h.jpg|thumb|300px]]
-This is the documentation page for the FT4222h breakout board.
+This is the documentation page for the FT4222h breakout board. That you can buy in the [http://www.bitwizard.nl/shop/breakout-boards?product_id=150 BitWizard shop].
 == overview ==

@@ Line 13: / Line 13: @@
 == pinout ==
+See [[SPI connector pinout]] for the pinout of the SPI connectors.
 <TODO>