LAN9353 Datasheet, PDF (478/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
15.8.48 1588 GPIO X RISING EDGE CLOCK NANOSECONDS CAPTURE REGISTER
(1588_GPIO_RE_CLOCK_NS_CAP_X)
Offset:
Bank:
170h
3
Size:
32 bits
This read only register combined with the 1588 GPIO x Rising Edge Clock Seconds Capture Register (1588_GPI-
O_RE_CLOCK_SEC_CAP_x) forms the GPIO rising edge timestamp capture.
Note: Values are only valid if the appropriate 1588 GPIO Rising Edge Interrupt (1588_GPIO_RE_INT[7:0]) in the
1588 Interrupt Status Register (1588_INT_STS) indicates that a timestamp is available.
Note:
Unless the corresponding Lock Enable GPIO Rising Edge (LOCK_GPIO_RE) bit is set, a new capture may
occur between reads of this register and the 1588 GPIO x Rising Edge Clock Seconds Capture Register
(1588_GPIO_RE_CLOCK_SEC_CAP_x). Software techniques are required to avoid reading intermediate
values.
Note:
Port and GPIO registers share a common address space. GPIO registers are selected by the Bank Select
(BANK_SEL[2:0] in the 1588 Bank Port GPIO Select Register (1588_BANK_PORT_GPIO_SEL). The GPIO
accessed (“x”) is set by the GPIO Select (GPIO_SEL[2:0]) field.
Note: All 8 GPIO register sets are available.
Bits
31:30
29:0
Description
RESERVED
Timestamp NanoSeconds (TS_NS)
This field contains the nanoseconds portion of the timestamp upon the rising
edge of a GPIO or upon a software commanded manual capture.
Type
RO
RO
Default
-
00000000h
DS00001925A-page 478
 2015 Microchip Technology Inc.