em78p5842 ELAN Microelectronics Corp, em78p5842 Datasheet - Page 3

• Manufacturer Part Number: em78p5842
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

Table4: Differences between EM78P5840, EM78P5841 and EM78P5842:
User Application Note
(Before using this chip, take a look at the following description note, it includes important messages.)
1. There are some undefined bits in the registers. The values in these bits are unpredicted. These
2. You will see some names for the register bits definitions. Some name will be appear very
3. Please do not switch MCU operation mode from normal mode to sleep mode directly. Before
4. While switching main clock (regardless of high freq to low freq or on the other hand), adding 6
5. Offset voltage will effect ADC’s result, please refer to figure 16 to detail.
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
frequently in the whole spec. The following describes the meaning for the register’s definitions
such as bit type, bit name, bit number and so on.
instructions delay (NOP) is required.
bits are not allowed to use. We use the symbol “-” in the spec to recognize them. A fixed value
must be write in some specific unused bits by software or some unpredicted wrong will occur.
into sleep mode, please switch MCU to green mode.
Register name and its page
IO (MAX)
Pin count
Bit number
PWM
Bit name
Bit type
RA
PAGE0
R/W-0
RAB7
7
read/write
(default value=0)
R/W-0
RAB6
EM78P5840
6
18
16
X
read only
(default value=1)
BAB5
R-1
5
read/write
(default value=1)
R/W-1
RAB4
4
EM78P5841
2 channel
1
(undefined) not allowed to use
20
18
X
3
read only
(w/o default value)
RAB2
R
2
EM78P5842
2 channel
24
22
read only
(default value=0)
RAB1
R-0
EM785840/5841/5842
1
8-bit Micro-controller
2004/11/10 V1.2
read/write
(w/o default value)
RAB0
R/W
0