SS1102C Datasheet, PDF (106/129 Pages) List of Unclassifed Manufacturers – Integrated MCU with Spread-Spectrum Transceiver (SST)

SS1102C Special Modes
TABLE 73.
16.3. MULTICHIP PROGRAM MEMORY INTERFACE
The SS1102C has 26 extra bond pads on the die which are external ROM memory
interface.
The pins and their functions are listed below. Pins beginning with the letter E are shared
with the emulation mode. This external ROM memory mode is entered by driving the
NXROM pin low. This causes the SS1102C to redirect program memory fetches
through this interface. The EPSEN is the NMOE, EAD7-0 is M7-0, and EA15-8 is
M15-8 function from the SM8200 core. MD7-0 is the same as the MD7-0 of the
SM8200 core being the opcode input to the CPU.
PIN
NXROM
MD7-0
EAD7-0
EA15-8
EPSEN
TYPE
INPUT
INPUT
OUTPUT
OUTPUT
OUTPUT
FUNCTION
Mode control
Opcode data input
Low byte address
High byte address
Program store enable for program memory read active low
External Memory Interface Pin Description
PRELIMINARY V1.8
101