73m2910l ETC-unknow, 73m2910l Datasheet - Page 11

• Manufacturer Part Number: 73m2910l
• Description: Microcontroller
• Manufacturer: ETC-unknow

CHIP SELECT PIN
RESERVED FOR INTERNAL USE
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
The chip selects partition a 64K memory space as follows:
NOTE:External addresses 0000H-00FFH may not be read. These are reserved for 73M2910L internally defined
USR5 PORT
USR5 Port Register External Address 0006h
Byte Addressable
Reset State 60h
This register allows user programmable wakeup capability. If this is not required, this register can be used to
read external signals at the USR5.1 and USR5.0 pins.
Bit 7 USR5 Input Port Enable
Bit 7 is used to enable the USR5.1 and USR5.0 input circuitry. If this bit is a 0, the USR5 pin output circuitry is
driven to a known level internally and any signal level at the pin is ignored. When set to a 1 the pin input
circuitry is enabled and the values of these pins are reflected in bits 6 and 7. If these pins are not connected at
the board level, this bit should remain at a 0 to keep the pin input circuitry from drawing unnecessary current.
The USR5 Register can be programmed such that a transition (bit 4 determines rising or falling) of USR5.0, a
transition (bit 3 determines rising or falling) of USR5.1, or the logical combination of USR5.0 (bit 4 determines
high or low level) AND USR5.1 (bit 3 determines high or low level) can wakeup the processor from its
power-down mode.
BIT 6 USR5.0
Bit 6 reflects the value of chip pin USR5.0 if the USR5EN bit is set to a 1.
BIT 5 USR5.1
Bit 5 reflects the value of chip pin USR5.1 if the USR5EN bit is set to a 1.
USR5EN
BIT 7
registers
(USR4.0)
(USR4.1)
(USR4.2)
(USR4.3)
(USR4.4)
(USR4.5)
(USR4.6)
(USR4.7)
USR5.0
BIT 6
USR5.1
BIT 5
POL5.0
BIT 4
11
8000H - FFFFH
0000H - 00FFH
0100H - 01FFH
0200H - 03FFH
0400H - 07FFH
0800H - 0FFFH
1000H - 1FFFH
2000H - 3FFFH
4000H - 7FFFH
POL5.1
ADDRESS
BIT 3
ACTE0
BIT 2
Microcontroller
ACTE1
BIT 1
# BYTES
16K
32K
256
256
512
1K
2K
4K
8K
AND01
BIT 0