MK50H27PLCC datasheet(17/56 Pages) STMICROELECTRONICS

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TUR

TRANSMITTER UNDERRUN indicates that the MK50H27 has aborted

signal unit since data was late from memory.

This condition is

reached

when the transmitter and transmitter FIFO both become

empty while transmitting a signal unit. When TUR is set, an interrupt

is generated if INEA = 1. TUR is READ/CLEAR ONLY and is set by

MK50H27 and cleared by writing a ”1” into the bit. Writing a ”0” has

no effect. It is also cleared by RESET or by issuing a Power Off primi-

tive.

PINT

PRIMITIVE INTERRUPT is set after the chip updates the primitive

generated if INEA =1. PINT is READ/CLEAR ONLY and is set by

MK50H27 and cleared by writing a ”1” into the bit. Writing a ”0” has no

effect. It is also cleared by RESET or by issuing a Power Off primitive.

TINT

TRANSMITTER INTERRUPT is set after the chip updates an entry

in the Transmit Descriptor Ring. When TINT is set, an interrupt is

generated if INEA =1. TINT is READ/CLEAR ONLY and is set by

MK50H27 and cleared by writing a ”1” into the bit. Writing a ”0” has no

effect. It is also cleared by RESET or by issuing a PowerOff primitive.

RINT

RECEIVER INTERRUPT is set after the MK50H27 updates an entry in

the Receive Descriptor Ring. When RINT is set, an interrupt is gener-

ated if INEA =1. RINT is READ/CLEAR ONLY and is set by MK50H27

and cleared by writing a ”1” into the bit. Writing a ”0” has no effect.

It is cleared by Bus RESET or by issuing a Power Off primitive.

This bit is READ ONLY and will always read as a zero.

4.1.2.2 Control and Status Register 1 (CSR1)

RAP <3:1> = 1

BIT

NAME

DESCRIPTION

UERR

USER PRIMITIVE ERROR is set by the MK50H27 when a primitive is

issued by the user which is in conflict with the current status of the link.

UERR is READ/CLEAR ONLY and is set by MK50H27 and cleared by

writing a ”1” into the bit. Writing a ”0” in this bit has no effect. It is

also cleared by Bus RESET.

UAV

USER PRIMITIVE AVAILABLE is set by the user when a primitive is

written into UPRIM. It is cleared by the MK50H27 after the primitive

has been processed. This bit is also cleared by a Bus RESET.

13:08

UPRIM

USER PRIMITIVE is written by the user, in conjunction with setting

UAV, to control the MK50H27 link procedures. The following primitives

are available:

Power Off: causes the MK50H27 to enter the Power Off state. All DMA

activity ceases, the transmitter transmits all ones, and all

received

data is ignored. Valid in all states except Power Off.

Power On: valid only in the Power Off phase and must be issued after

the Init primitive and prior to the Start primitive. Causes the MK50H27

to exit the Power Off phase and to enter the Out of Service phase and

UPRIM

<5:0>

PPRIM

<5:0>

MK50H27

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