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参数资料
| 型号： | PMB2341 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | 10-pin Single PLL |
| 中文描述： | 10针单锁相环 |
| 文件页数： | 19/26页 |
| 文件大小： | 410K |
| 代理商： | PMB2341 |
Applications
4 - 7
PMB 2341
preliminary
Wireless Components
Confidential
Specification, February 2000
4.3 Special programming sequences
Fast wake-up programming:
When the circuit is connected to the supply voltage all registers are undefined. Due to
the fact that each counter is loading its new start value after it is decremented to
zero
“
,
the start-up time of the counters with the programmed values is too long for some
applications. If the device has previously been set to ALLOFF- or AMPRUN-mode (see
Table 5) afterwards is turned to operating mode ALLRUN, the counters are starting
immediatly with the preprogrammed start values. Therefore for fast startup after standby
the following data transfer sequence is recommended:
Table 4-10Test mode installation bits
Control Bits
mode 1 mode 2
1
Mode
1
OPERATE
:
Normal operation of PLL and RI Buffer in installed mode.
MFO pin has programmed level.
not used
:
identical to OPERATE
Testmode RCNTOUT:
Charge pump is turned off. R-counter output at
multifunctional MFO pin.
Testmode NCNTOUT:
Charge pump is turned off. N-counter output at
multifunctional MFOMFO pin.
0
1
1
0
0
0
Table 4-11Fast Wake Up Data Transfer Sequence
Step
1
Serial Data Transfer Sequence
Long Control Word:
’
OPERATE
’
2
Set A-/N-Counter: AMPRUN mode
3
Set R-Counter
4
Set A-/N-Counter, AMPRUN mode
5
Set A-/N-Counter, ALLRUN mode
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