83C754 Datasheet, PDF (8/26 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/256 OTP/ROM, DAC, comparator, UART, reference

Philips Semiconductors
80C51 8-bit microcontroller family
4K/256 OTP/ROM, DAC, comparator, UART, reference
Preliminary specification
83C754/87C754
AV_CC
DECOUPLE
VREG
XYDACBIAS
XYSOURCE
XYDAC
AC1
AC2
AC3
BANDGAP REF*
20K
AC4
1K
DCON 7:0 (84H)
ZDAC
ZIN
YIN
XIN
XYZRAMP
*ENABLED/DISABLED BY AC0
AC6
ANALOG
MUX
MUX0
MUX1
MUX2
AC5
BANDGAP REF
EXT
Figure 3. Analog Section
READ
LATCH
INT. BUS
WRITE TO
LATCH
ALTERNATE
OUTPUT
FUNCTION
D
Q
LATCH
CL
Q
V_DD
INTERNAL*
PULL-UP
PIN
READ
PIN
ALTERNATE INPUT
FUNCTION
*PINS LISTED AS OPEN DRAIN WILL NOT HAVE THIS PULLUP
SU00671
Figure 4. Typical Port Bit Latches and I/O Buffers
10K
AC7
TO PCA TRIGGER
SU00765A
1998 Apr 23
8