PEB2447 SIEMENS [Siemens Semiconductor Group], PEB2447 Datasheet - Page 24

• Manufacturer Part Number: PEB2447
• Description: Memory Time Switch Extended Large MTSXL
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
Typical Write Operation:
WR MWDL
WR MWDH
WR MAAL
WR MACH
3.4
If the device is in synchronized state (STAR:PSS = 1) and for example the command
“frame evaluation at FS5” (CMDR = 58
edge of FS5 is evaluated and creates the following result in register FERH:FERL (see
also table 15):
Figure 8
Frame Evaluation
Note: The frame evaluation procedure gives (roughly) the number to be programmed in
ICSR (after inversion of FER0): FEV 11..1 give the number of complete CLK
periods; FEV 0 gives the sampling edge (falling / rising). Due to the internal delay
in the MTSXL the sampling region and therefor the result in FEV 11..1 is shifted
against CLK for a time “ X” which is uncertain between 0 < X < 13 ns. If the rising
edge of FS occurs in that uncertain region the value of FER 11..1 might vary + 1
(FER 0 inverted before!).
Frame Evaluation
RD STAR; STAR:MAC = 0
H
) is programmed, the second following rising
24
Typical Read Operation:
WR MAAL
WR MACH
RD MRDL
RD MRDH
RD STAR; STAR:MAC = 0
Operational Description
PEB 2447
03.97