參數(shù)資料
型號: MC68HC16Y1
廠商: Motorola, Inc.
英文描述: 16-Bit Modular Microcontroller(16位模塊化微控制器)
中文描述: 16位微控制器模塊(16位模塊化微控制器)
文件頁數(shù): 63/122頁
文件大小: 749K
代理商: MC68HC16Y1
MC68HC16Y1
MC68HC16Y1TS/D
MOTOROLA
63
3.10.2 Pin Assignment Registers
The pin assignment registers contain pairs of bits that determine the functions of chip select pins. Alter-
nate functions of the associated pins are shown in parentheses. Reset value depends on the operating
mode.
In the following register diagrams, reset values are shown in the following order: single-chip modes, par-
tially expanded mode, and fully expanded mode. The notation “DATA#” indicates that a bit goes to the
logic level of that data bus pin on reset. DATA lines have weak pull-ups — during reset in fully expanded
mode, an active external device can pull the data lines low to select alternate functions.
CSPAR0[15:14] — Not used.
These bits always read zero; write has no effect.
CSPAR011 — Not used.
CSPAR010 determines whether pin is FC1 or a discrete output.
CSPAR1[15:10] — Not used.
These bits always read zero; write has no effect. Clearing both CS10 select bits (CSPAR1[9:8]) enables
the M6800 bus clock (ECLK) on ADDR23.
The table below shows pin assignment register encoding.
A pin programmed as a discrete output drives an external signal to the value specified in the Port C data
register (PORTC), with the following exceptions:
No discrete output function is available on pins BR, BG, or BGACK.
ADDR23 provides ECLK output rather than a discrete output signal.
CSPAR0
— Chip Select Pin Assignment Register 0
$YFFA44
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
CS5
(FC2)
0
FC1
CS3
(FC0)
CSE
(BGACK)
CSM
(BG)
CS0
(BR)
CSBOOT
RESET:
0
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
0
0
1
0
0
1
1
0
0
1
0
1
1
0
1
0
0
0
DATA2
1
0
1
DATA2
1
DATA10
1
DATA10
1
DATA2
1
1
DATA0
CSPAR1
— Chip Select Pin Assignment Register 1
$YFFA46
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
CS10
(ADDR23)
CS9
(ADDR22)
CS8
(ADDR21)
CS7
(ADDR20)
CS6
(ADDR19)
RESET:
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
DATA7 1
DATA6 1
DATA5 1
DATA4 1
DATA3 1
Bit Pair
00
01
10
11
Description
Discrete Output
Alternate Function
Chip Select (8-Bit Port)
Chip Select (16-Bit Port)
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