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參數資料
型號: MC68HC916X1
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: 126/172頁
文件大小: 1035K
代理商: MC68HC916X1
MOTOROLA
126
MC68HC916X1
MC68HC916X1TS/D
FRZ — Freeze Mode Control
0 = Disable program/erase voltage while FREEZE is asserted
1 = Allow ENPE bit to turn on the program/erase voltage while FREEZE is asserted
BOOT — Boot Control
0 = Flash EEPROM module responds to bootstrap addresses after reset
1 = Flash EEPROM module does not respond to bootstrap addresses after reset
On reset, BOOT
takes on the value stored in its associated shadow bit. If BOOT = 0 and STOP = 0, the
module responds to program space accesses to IMB addresses $000000 to $000006 following reset,
and the contents of FEExBS[3:0] are used as bootstrap vectors. After address $000006 is read, the
module responds normally to control block or array addresses only.
LOCK — Lock Registers
0 = Write-locking disabled
1 = Write-locked registers protected
If the reset state of LOCK is zero, it can be set once after reset to allow protection of the registers after
initialization. Once the LOCK bit is set by software, it cannot be cleared again until after a reset.
ASPC[1:0] — Flash EEPROM Array Space
ASPC[1:0] assigns the array to supervisor or user space, and to program or data space. The state of
ASPC[1:0] out of reset is determined by the value stored in the associated shadow bits. Since the
CPU16 runs only in supervisor mode, ASPC1 must remain set to one for array accesses to take place.
The field can be written only when LOCK = 0 and STOP = 1. Refer to
Table 66
.
WAIT[1:0] — Wait States
The state of WAIT[1:0] out of reset is determined by the value stored in the associated shadow bits.
WAIT[1:0] specifies the number of wait states inserted during accesses to the flash EEPROM module.
A wait state has the duration of one system clock cycle. WAIT[1:0] affects both control block and array
accesses, and can be written only if LOCK = 0 and STOP = 1. Refer to
Table 67
.
The value of WAIT[1:0] is compatible with the lower two bits of the DSACK field in the SCIM chip-select
option registers. An encoding of %11 in WAIT[1:0] corresponds to an encoding for fast termination.
FEE1TST, FEE2TST
— Flash EEPROM Test Registers
These registers are used for factory test only.
$YFF802, $YFF822
Table 66 Array Space Encoding
ASPC[1:0]
10
11
Type of Access
Supervisor program and data space
Supervisor program space
Table 67 Wait State Encoding
WAIT[1:0]
00
01
10
11
Wait States
0
1
2
–1
Clocks Per Transfer
3
4
5
2
相關PDF資料
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