MC68HC705B16CFN

Manufacturer Part NumberMC68HC705B16CFN
DescriptionIC MCU 2.1MHZ 15K OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC05
MC68HC705B16CFN datasheet
 


Specifications of MC68HC705B16CFN

Core ProcessorHC05Core Size8-Bit
Speed2.1MHzConnectivitySCI
PeripheralsPOR, WDTNumber Of I /o32
Program Memory Size15KB (15K x 8)Program Memory TypeOTP
Eeprom Size256 x 8Ram Size352 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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C.4
Options register (OPTR)
Address
(1)
Options (OPTR)
$1EFE
(1) This register is implemented in EPROM, therefore reset has no effect on the state of the individual bits.
Note:
This register can only be written to while the device is in bootloader mode.
Bit 7 — Factory use only
Warning: This bit is strictly for factory use only and will always read zero to avoid accidental
damage to the device. Any attempt to write to this bit could result in physical damage.
EPP — EPROM protect
This bit protects the contents of the main EPROM against accidental modification; it has no effect
on reading or executing code in the EPROM.
1 (set)
–
EPROM contents are protected.
0 (clear) –
EPROM contents are not protected.
RTIM — Reset time
This bit can modify t
, i.e. the time that the RESET pin is kept low following a power-on reset.
PORL
This feature is handled in the ROM part via a mask option.
1 (set)
–
t
= 16 cycles.
PORL
0 (clear) –
t
= 4064 cycles.
PORL
RWAT — Watchdog after reset
This bit can modify the status of the watchdog counter after reset.
1 (set)
–
The watchdog will be active immediately following power-on or
external reset (except in bootstrap mode).
0 (clear) –
The watchdog system will be disabled after power-on or external
reset.
WWAT — Watchdog during WAIT mode
This bit can modify the status of the watchdog counter during WAIT mode.
MC68HC05B6
Rev. 4.1
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
EPP
0
RTIM RWAT WWAT PBPD PCPD Not affected
MC68HC705B5
State
bit 1
bit 0
on reset
14
Freescale
C-7

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