C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 149

• Manufacturer Part Number: C505_9708
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 6-38
Microcontroller Handling of the Last Message Object’s Alternating Buffer
Semiconductor Group
Store received
MSGLST is set
Allocated:NEWDAT = 1 OR RMTPND = 1
Released:NEWDAT = 0 AND RMTPND = 0
message into
Buffer 1
Store received
MCU access to Buffer 2
MCU access to Buffer 2
MCU releases Buffer 2
into Buffer 1
Message
Buffer 2 = allocated
Buffer 2 = allocated
Buffer 1 = released
Buffer 1 = allocated
MCU allocates Buffer 2
MCU releases
Buffer 2
MCU access to Buffer 2
Buffer 1 = released
Buffer 2 = released
Reset
6-87
MCU releases
On-Chip Peripheral Components
Store received Message
Buffer 1
into Buffer 1
MCU access to Buffer 1
MCU access to Buffer 1
MCU releases Buffer 1
Buffer 2 = allocated
Buffer 1 = allocated
Buffer 2 = released
Buffer 1 = allocated
Store received
into Buffer 2
Message
Store received
MSGLST is set
message into
Buffer 2
MCD02744
C505C Only
1997-08-01