SAH-C515 SIEMENS [Siemens Semiconductor Group], SAH-C515 Datasheet - Page 138

• Manufacturer Part Number: SAH-C515
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

9.6
In the idle mode and in the power down mode the port pins of the C515 have a well defined status
which is listed in the following table 9-1. This state of some pins also depends on the location of the
code memory (internal or external).
Table 9-1
Status of External Pins During Idle and Software Power Down Mode
Outputs
ALE
PSEN
PORT 0
PORT 2
PORT 1, 3, 4
Semiconductor Group
State of Pins in the Power Saving Modes
Idle
High
High
Data
Data
Data /
alternate outputs
Last Instruction Executed from
Internal Code Memory
Power Down
Low
Low
Data
Data
Data /
last output
9-7
Idle
High
High
Float
Address
Data /
alternate outputs
Last Instruction Executed from
External Code Memory
Power Saving Modes
Power Down
Low
Low
Float
Data
Data /
last output
C515