Reference Manual

PMAC-Mini PCI Hardware Reference Manual
E-Point Jumper Descriptions 23
E44 - E47: Communications Control
Baud Rate Control
E Points
Baud Rate
Default and Physical
Layout
E44 E45
E46 E47 Standard CPU,
40 MHz Flash
CPU (Opt 5A)
60 MHz
Flash CPU
(Opt 5B)
E44 E45 E46 E47
ON ON ON ON Disabled Disabled
OFF ON ON ON 600 900
ON OFF ON ON 800* 1200
OFF OFF ON ON 1200 1800
ON ON OFF ON 1600* 2400
OFF ON OFF ON 2400 3600
ON OFF OFF ON 3200* 4800
OFF OFF OFF ON 4800 7200
ON ON ON OFF 6400* 9600 Opt 5B
OFF ON ON OFF 9600 14400 Standard, Opt 5A
ON OFF ON OFF 12800* 19200
OFF OFF ON OFF 19200 28800
ON ON OFF OFF 25600* 38400
OFF ON OFF OFF 38400 57600
ON OFF OFF OFF 51200* 76800
OFF OFF OFF OFF 76800 115200
Jumpers E44 - E47 control what baud rate is used for serial communications. Any character received over the
bus causes PMAC to use the bus for its standard communications. The serial port is disabled if E-points E44-
E47 are all on.
These jumpers are read only at power-up/reset to set the baud rate at that time. Currently, Flex CPU’s
communication baud rate is determined at power-up/reset by variable I54.
* Non-standard baud rate
E48: Reserved for future use
E-Point and
Physical Layout
Location Description Default
E48
E2
Reserved for future use No jumper installed