zl50023 Zarlink Semiconductor, zl50023 Datasheet - Page 31

• Manufacturer Part Number: zl50023
• Description: Enhanced 4 K Channel Tdm Switch With Rate Conversion
• Manufacturer: Zarlink Semiconductor

10.0
This feature allows for fast initialization of the connection memory after power up.
10.1
1. Set MBPE (bit 3) in the Control Register (CR) from low to high.
2. Configure BPD2 - 0 (bits 3 - 1) in the Internal Mode Selection (IMS) register to the desired values to be loaded
3. Start the block programming by setting MBPS (bit 0) in the Internal Mode Selection Register (IMS) high. The val-
The following tables show the resulting values that are in the CM_L and CM_H connection memory locations.
Note: Bits 15 to 5 are reserved in Connection Memory High and should always be 0.
It takes at least two frame periods (250 µs) to complete a block program cycle.
MBPS (bit 0) in the Control Register (CR) will automatically reset to a low position after the block programming
process has completed.
MBPE (bit 3) in the Internal Mode Selection (IMS) register must be cleared from high to low to terminate the block
programming process. This is not an automatic action taken by the device and must be performed manually.
Note: Once the block program has been initiated, it can be terminated at any time prior to completion by setting
MBPS (bit 0) in the Control Register (CR) or MBPE (bit 3) in the Internal Mode Selection (IMS) register to low. If the
MBPE bit was used to terminate the block programming, the MBPS bit will have to be set low before enabling other
device operations.
11.0
This device has two main operating modes - Divided Clock mode and Multiplied Clock mode.
In Multiplied Clock mode, output clocks and frame pulses are generated from an internal high-speed clock
synchronized to CKi and FPi. Therefore, all specified output clock rates and data rates are available on CKo0-3 and
STio0-31. In Divided Clock mode, output clocks and frame pulses are directly divided from CKi/FPi. Therefore, the
output clock rate cannot exceed the CKi rate (the output data rates are also limited as per Table 1). The input data
rate cannot exceed the CKi rate in either Multiplied or Divided Clock modes, because input data are always
sampled directly by CKi.
Table 7, “ZL50023 Operating Modes” on page 32 summarizes the different modes of operation available within the
ZL50023. Each Major mode (explained below) has various associated Minor modes that are determined by setting
Value
Value
Bit
Bit
into CM_L.
ues stored in BPD2 - 0 will be loaded into bits 2 - 0 of all CM_L positions. The remaining CM_L locations (bits 15
- 3) and the programmable values in the CM_H (bits 4 - 0) will be loaded with zero values.
Memory Block Programming Procedure
Connection Memory Block Programming
Device Performance Operation in Divided Clock and Multiplied Clock Modes
15
15
0
0
14
14
0
0
13
13
0
0
Table 6 - Connection Memory High After Block Programming
Table 5 - Connection Memory Low After Block Programming
12
12
0
0
11
11
0
0
10
10
0
0
Zarlink Semiconductor Inc.
9
0
9
0
ZL50023
8
0
8
0
31
7
0
7
0
6
0
6
0
5
0
5
0
4
0
4
0
3
0
3
0
BPD2
2
2
0
BPD1
Data Sheet
1
0
1
BPD0
0
0
0