Connect Tech Blue Heat/Net Sync User Manual
54
Revis
PLD Registers:
Offset Reg Name
R/W
Valid
Bit
Bit Descriptions
Reset
Values
(Hex)
1000
RTCU
Real Time Clock
Upper
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Msk1
MP
MPP
MPO
IntEN
SE
EXT
ME
Msk0
X
X
H4
H3
H2
H1
H0
Msk1:
On writes, set this bit to mask bits 14..8. This prevents previous settings of bits 14..8 from being changed.
MP:
Minute Pulse (read only):
Current State of Minute-Pulse signal (at the time of the read).
MPP:
Minute Pulse Pending (read only):
This bit is set to the same state as the MPO bit (when the MPO bit is written). When the MPO is
written high, this bit goes low (=0) when the
next
selected Minute-Pulse edge occurs.
MPO:
Minute Pulse Once:
When low (=0), the selected Minute-Pulse edge always resets the Seconds value. When high (=1) the RTC
increment is inhibited, then when the first selected Minute-Pulse edge occurs, the Seconds value will be zeroed, the MPP bit will be
cleared and the RTC increment will be enabled. All subsequent Minute-Pulses edges will be ignored.
IntEN:
Clock Interrupt Enable:
Enable an interrupt to occur on each clock increment pulse. The Interrupt is cleared by reading (or writing) the
RTC Lower Word (the Minutes/Seconds counter) or by disabling the interrupt. There is a dedicated interrupt signal to the Coldfire for
the RTC interrupt.
SE:
Seconds-Pulse Edge Select:
Selects the edge (of the Seconds-Pulse) which causes the RTC increment, 0=falling, 1=rising.
EXT:
External Time Base Select:
0=Internal Timebase (1 Hz), 1=External Timebase.
ME:
Minute Edge select:
Selects the edge (of the Minute-Pulse) which causes the RTC Seconds counter to be reset, 0=falling, 1=rising
Msk0:
On writes, set this bit to mask bits 6..0. This prevents previous settings of bits 6..0 from being changed.
H4..0
Hours Setting, or reading (a number between 0 and 23).
0000
1002
RTCL
Real Time Clock
Lower
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Msk
1
X
M5
M4
M3
M2
M1
M0
Msk
0
X
S5
S4
S3
S2
S1
S0
Msk1:
On writes, set this bit to mask bits 14..8. This prevents previous settings of bits 14..8 from being changed.
M5..0:
Minute Setting, or reading (a number between 0 and 59)
Msk0:
On writes, set this bit to mask bits 6..0. This prevents previous settings of bits 6..0 from being changed.
S5..0
Second Setting, or reading (a number between 0 and 59).
0000
1004
LEDC
LED Control
Register
R/W
D15..0
Control Bits: Read/Write only as a 16 Bit word.
Auto Flash Mode
Direct Mode
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
X
X
X
X
X
X
X
X
P4
P3
P2
P1
P4
P3
P2
P1
P4, P4, P2, P1
Port numbers
Direct Mode:
1= LED on, 0 = LED off
Auto Flash Mode:
1=LED on for 40ms / off for 40ms, 0=No effect
X=
Don‟t care, fixed to 0.
0000
