PEB2447 SIEMENS [Siemens Semiconductor Group], PEB2447 Datasheet - Page 37

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

4.6
Access in demultiplexed P-interface mode:
Write, address:
Reset value:
A logical 1 disables the corresponding interrupt as described in ISTA from activating the
INT pin. A masked interrupt (bit set to “1”) is stored internally and indicated, when reading
ISTA. It is also reset in this case.
4.7
Access in demultiplexed P-interface mode:
Read/write, address:
Reset value:
A write access (rising edge of WR or CS) to this register starts an indirect access to a
memory location.
MAC2..0
Table 11
Memory Access Codes
MAC2
0
0
0
0
1
All other combinations are not allowed
Note: A write & read control memory command actually writes a specific CM location
MA10..8
Semiconductor Group
and reads the same location in a second access.
Mask Register (MASK)
Memory Access Address/Code Register High (MACH)
MAC2 MAC1 MAC0
Bit 7
Bit 7
0
MAC1
0
0
1
1
0
Memory Access Code values to determine the type of access
to/from control and data memory locations. See table 11 for all
possible code values.
Memory Address (most significant) bits 10 to 8; refer to register
MAAL
0
MAC0
0
1
1
0
0
0
02
0F
04
0X
H
H
H
H
Function
No operation
Write control memory
Write & read control memory
Read control memory
Read data memory
0
0
37
FEC
0
MA10
PC
Detailed Register Description
MA9
IR
Max. Access Time
Clock Periods
–
4.5
6.5
4.5
8.5
MA8
Bit 0
Bit 0
PFI
PEB 2447
03.97