EM78P5840/5841/5842
8-bit Micro-controller
Table2: the major differences between EM78P5830 and EM78P5840 series:
EM78P5830 series
256 byte
EM78P5840 series
CID RAM
ERIC mode
NA
NA
Under 6M Hz
2M / 4M Hz
IRC1
IRC mode
NA
WDT source
External CNT1 input
P71 pull high
/RESET pin
PLLC pin
Crystal or PLL
NA
Shared with P94
External pull high
Shared with P71
Internal pull high
/RESET only
PLLC only
Crystal input
Shared with P70 and ERCI
Shared with P60 and P61
XIN, XOUT
Table3: the major differences between ICE5840, EM78P5840 and EM785840:
ICE5840
EM78P5840 series
NA
EM785840 series
NA
CID RAM
CID RAM address auto
+1
1024 byte
V
NA
NA
8 or 16 (shared with
CNT1 (**)
8 bit counter
8 bit counter
CNT2) bit counter
CNT2 (**)
STACK
V
X
8
V
8
12
** CNT2 is only exist on EM78P5840/41/42 and EM785840/41/42, CNT2 is un-support on ICE5840.
Table4: Differences between EM78P5840, EM78P5841 and EM78P5842:
EM78P5840
EM78P5841
EM78P5842
Pin count
PWM
18
X
20
2 channel
18
24
2 channel
22
IO (MAX)
16
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
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.
2. You will see some names for the register bits definitions. Some name will be appear very
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.
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
1
2004/11/10 V2.6
ELAN [ ELAN MICROELECTRONICS CORP ]
