em78p510nso32j/s ELAN Microelectronics Corp, em78p510nso32j/s Datasheet - Page 18

• Manufacturer Part Number: em78p510nso32j/s
• Description: 8-bit Microprocessor With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

EM78P510N
8-Bit Microprocessor with OTP ROM
12 •
6.2.5 R4 (RAM Select Register)
Bit 7 (VDB): Voltage Detector. This is a read only bit. When VDD pin voltage is lower
Bit 6 (BNC): Bank Control Register.
Bits 5~0: are used to select up to 64 registers in the indirect addressing mode.
6.2.6 Bank 0 R5 (RAM Bank Select Register)
Bits 7~3: Reserved
Bits 2~0 (BS2~BS0): RAM Bank Select Register
6.2.7 Bank 0 R7 (Port 7)
Bits 7~0 (R77~R70): Port 7 8-bit I/O Registers.
6.2.8 Bank 0 R8 (Port 8)
Bits 7~1 (R87~R81): Port 8 7-bit I/O Registers.
Bit 0:
Bit 7
Bit 7
Bit 7
R77
R87
0
BS2
0
0
1
:
:
Reserved
then Vdet (select by LVDS0~LVDS1) this bit will be cleared.
0 : low voltage is detected
1 : low voltage is not detected or LVD function is disabled
0 : allow to access only Bank 0 registers
1 : Allow to access all registers of any Bank
See the configuration of the data memory. User can use BANK instruction
to change bank.
Bit 6
Bit 6
Bit 6
R76
R86
0
Bit 5
Bit 5
Bit 5
BS1
R75
R85
0
0
1
0
:
:
Bit 4
Bit 4
Bit 4
R74
R84
(This specification is subject to change without further notice)
0
BS0
0
1
1
:
:
Bit 3
Bit 3
Bit 3
R73
R83
0
Product Specification (V1.1) 01.25.2008
Bit 2
Bit 2
Bit 2
R72
R82
BS2
RAM Bank
Bank 0
Bank 1
Bank 7
Bit 1
Bit 1
Bit 1
R71
R81
BS1
:
:
Bit 0
Bit 0
Bit 0
R70
BS0
0