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Update manpage for USBtiny and direct SPI

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David Fries 2015-01-01 19:58:23 -06:00 committed by Andrej Shadura
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commit 40f0fae5a4
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@ -838,7 +838,7 @@ Display the device signature bytes.
Enter direct SPI mode. The
.Em pgmled
pin acts as slave select.
.Em Only supported on parallel bitbang programmers.
.Em Only supported on parallel bitbang programmers, and partially by USBtiny.
.It Ar part
Display the current part settings and parameters. Includes chip
specific information including all memory types supported by the
@ -1271,7 +1271,8 @@ This also applies to the STK500 and STK600 in parallel programming mode.
.Pp
The USBasp and USBtinyISP drivers do not offer any option to distinguish multiple
devices connected simultaneously, so effectively only a single device
is supported.
is supported. Slave Select must be externally held low for direct SPI when
using USBtinyISP, and send must be a multiple of four bytes.
.Pp
The avrftdi driver allows one to select specific devices using any combination of vid,pid
serial number (usbsn) vendor description (usbvendoror part description (usbproduct)