EM77950
BB Controller
6 Memory
6.1 Program Memory
The EM77950 has a 14-bit program counter (PC). The space of program memory,
which is partitioned into 2 pages can address up to 12K. One page has 8K in length,
and the other is 4K. Fig. 6-1 depicts the profile of the program memory and stack. The
initial address is 0x0000. The table of interrupt-vectors starts from 0x10 to 0x80 with
every other eight-address space.
INT
CALL
LPC
HPC
A13 A12 A11 A10 A9 A8
A7~A0
Stack 0
Stack 1
RET
RETL
RETI
PS0
0
Address
Page
0000 ~ 1 FFF
2000 ~ 2FFF
0
1
1
ROMPS2
ROMPS1
ROMPS0
ACC2 SR2 RAMBS02
ACC1 SR1
Stack 1E
Stack 1F
RAMBS01
ACC0 SR0 RAMBS00
Addr
0000
Vector
Reset
0010 Key Wake-up
0020
TCCOF
0028 FRCOF
Fig. 6-1 Configuration of Program Memory (ROM) for EM77950
10 •
Product Specification (V1.0) 10.09.2007
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
