diff options
Diffstat (limited to 'manual/plugins/alpinecdc.tex')
-rw-r--r-- | manual/plugins/alpinecdc.tex | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/manual/plugins/alpinecdc.tex b/manual/plugins/alpinecdc.tex index 008bb62975..8d0fcee746 100644 --- a/manual/plugins/alpinecdc.tex +++ b/manual/plugins/alpinecdc.tex | |||
@@ -13,11 +13,11 @@ Hookup to Archos works by connecting the headphone output including the remote | |||
13 | pin (you need a 4-ring 3.5 mm plug for that) to the changer jack of the radio. | 13 | pin (you need a 4-ring 3.5 mm plug for that) to the changer jack of the radio. |
14 | M-Bus radios have a DIN-style circular jack with 8 pins (7 in a $\sim$ 270 degree | 14 | M-Bus radios have a DIN-style circular jack with 8 pins (7 in a $\sim$ 270 degree |
15 | circle, one in the center). A standard 5-pin DIN plug is OK for this, since we | 15 | circle, one in the center). A standard 5-pin DIN plug is OK for this, since we |
16 | don't use the other (power) pins. | 16 | do not use the other (power) pins. |
17 | 17 | ||
18 | As OEM, they shuffled the pins around a bit, better check first if it is not | 18 | As OEM, they shuffled the pins around a bit, better check first if it is not |
19 | genuine Alpine. The bus pin is pulled high to 12 volts with a $\sim$ 2kOhm resistor, | 19 | genuine Alpine. The bus pin is pulled high to 12 volts with a $\sim$ 2kOhm resistor, |
20 | pulses driven low. Because it's open collector, this is not harmful to the | 20 | pulses driven low. Because it is open collector, this is not harmful to the |
21 | Archos.\\ | 21 | Archos.\\ |
22 | ASCII art of the 4-pin headphone plug: | 22 | ASCII art of the 4-pin headphone plug: |
23 | \begin{verbatim} | 23 | \begin{verbatim} |
@@ -28,12 +28,12 @@ ASCII art of the 4-pin headphone plug: | |||
28 | |_| ground -> Alpine pin 2 + 3 | 28 | |_| ground -> Alpine pin 2 + 3 |
29 | \end{verbatim} | 29 | \end{verbatim} |
30 | 30 | ||
31 | The remote pin can be programmed bidirectional, that's the reason this works. | 31 | The remote pin can be programmed bidirectional, that is the reason this works. |
32 | Very luckily the M-Bus uses a single wire communication and the two radios I | 32 | Very luckily the M-Bus uses a single wire communication and the two radios I |
33 | tried are happy with the 3.3 Volt level the Arcos can deliver. So the | 33 | tried are happy with the 3.3 Volt level the Arcos can deliver. So the |
34 | connection is a simple cable! For all protocols requiring more lines, an | 34 | connection is a simple cable! For all protocols requiring more lines, an |
35 | external controller would be necessary. | 35 | external controller would be necessary. |
36 | 36 | ||
37 | \note{Archos FMs don't have the remote pin internally connected, but | 37 | \note{Archos FMs do not have the remote pin internally connected, but |
38 | one unit that was opened was internally prepared for it, a matter of closing a | 38 | one unit that was opened was internally prepared for it, a matter of closing a |
39 | bridge.} | 39 | bridge.} |