C511_1 Datasheet, PDF (102/128 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

EEPROM Programming Interface
SAB-C513A-H
Figure 9-2
SAB-C513A-H Pin Configuration in Programming Mode
Table 9-1
Pin Definitions and Functions in Programming Mode
Symbol Pin Number I/O*) Function
P-LCC-44
PRES
15
I
Programming Interface Reset
A high level on this input resets the programming interface and
its registers to their initial state.
AD0 - AD7 43 - 36
I/O Bidirectional Address/Data Bus
AD0-7 is used to transfer data to and from the registers of the
programming interface and to read the data of the memory field
during EEPROM verification.
PALE
16
I
Programming Address Latch Enable
This input is used to latch address information at AD0-7. The
trailing edge of PALE is used to latch the register addresses.
Each read or write access in programming mode must be
initiated by a PALE high pulse.
PRD
18
I
Programming Read Control
A low level at this pin (and PCS=low) enables the AD0-7 buffers
for reading of the data or control registers of the programming
interface.
*) I = Input
O = Output
Semiconductor Group
9-2