Motorola MPC823e - Timebase Reference Registers

System Interface Unit
MOTOROLA MPC823e REFERENCE MANUAL 12-15
SYSTEM INTERFACE UNIT
12
TBL—Timebase Lower
The value stored in this field is used as the lower part of the timebase register.
12.6.2 Timebase Reference Registers
There are two special-purpose 32-bit read/write timebase reference registers—TBREFU
and TBREFL—associated with the upper and lower parts of the timebase. When there is a
match between the contents of the timebase and the reference register, a reference interrupt
is enabled in the timebase control and status register.
TBREFU—Timebase Reference Upper
These bits represent the 32-bit reference value for the upper part of the timebase.
TB-LOWER
BIT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FIELD TBL
RESET —
R/W R/W
SPR 268 (READ), 284 (WRITE)
BIT 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
FIELD TBL
RESET
R/W
SPR 268 (READ), 284 (WRITE)
NOTE: — = Undefined.
TBREFU
BIT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FIELD TBREFU
RESET —
R/W R/W
ADDR (IMMR & 0xFFFF0000) + 0x204
BIT 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
FIELD TBREFU
RESET —
R/W R/W
ADDR (IMMR & 0xFFFF0000) + 0x206
NOTE: — = Undefined.