zlf645e0s2832g ZiLOG Semiconductor, zlf645e0s2832g Datasheet - Page 176
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zlf645e0s2832g
Manufacturer Part Number
zlf645e0s2832g
Description
Crimzon Infrared Microcontrollers Zlf645 Series Flash Mcus With Learning Amplification
Manufacturer
ZiLOG Semiconductor
Datasheet
1.ZLF645E0S2832G.pdf
(197 pages)
- Current page: 176 of 197
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Table 85. User Option Byte 0 Shadow Register (OPT0SR)
PS026407-0408
Bit
Field
Reset State
CPU Access (R/W)
Register Address (R/W)
Note:
Note:
User Option Byte 1 and Option Byte 1 Shadow Register
Definitions
User Option byte allows the enabling of various features including protecting the Flash’s
main memory from read operations through either of the ZLF645’s Flash access inter-
faces. For it’s associated shadow registers, until the registers are loaded with their corre-
sponding option bit values, their outputs will be in an unknown state.
Table 86
This byte can be programmed and erased (by Page 3 erase) only through the ICP.
During device Power-on Reset, bit 1 and bit 0 value of this Flash Option byte are sampled
into flip-flops, whose outputs control the Flash memory protect function. User codes can
read the flip-flop values, by reading from a uniquely assigned peripheral register address.
User codes cannot over-write the flip-flop values to change this Flash memory protect
function.
describes User Option byte 1 function.
P2PU = 1: Port 2 Pull-ups disabled.
P2PU = 0: Port 2 Pull-ups enabled.
P1HPU = 1: Port 1 high nibble Pull-ups disabled
P1HPU = 0: Port 1 high nibble Pull-ups enabled.
P1LPU = 1: Port 1 low nibble Pull-ups disabled.
P1LPU = 0: Port 1 low nibble Pull-ups enabled.
P0HPU = 1: Port 0 high nibble Pull-ups disabled.
P0HPU = 0: Port 0 high nibble Pull-ups enabled.
P0LPU = 1: Port 0 low nibble Pull-ups disabled.
P0LPU = 0: Port 0 low nibble Pull-ups enabled.
WDT
R/W
X
7
P4PU
R/W
6
X
P3PU
R/W
X
5
Bank D: 0Eh; Linear: D0Eh
P2PU
R/W
X
4
P1HPU P1LPU
R/W
X
3
ZLF645 Series Flash MCUs
R/W
Product Specification
X
2
P0HPU
R/W
X
1
Operation
P0LPU
R/W
X
0
168
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