upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 33

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

* 1. Data of data memory addresses 0F8H to 0FDH becomes indeterminate by RESET input.
Stack pointer (SP)
Data memory (RAM)
General registers (X, A, H, L, D, E, B, C)
Bank select registers (MBS, RBS)
Timer/event
counter
Serial
interface
Digital port
Program counter (PC)
PSW
Basic interval
timer
Timer/pulse
generator
Watch timer
Clock
generator
Interrupt
Port H
FIP controller/
driver
Power on flag (PONF)
2. 1 upon power-on reset, indeterminate after RESET input in operation.
Carry flag (CY)
Skip flag (SK0 to SK2)
Interrupt status flag (IST0, IST1)
Bank enable flags (MBE, RBE)
Counter (BT)
Mode register (BTM)
Counter (T0)
Modulo register (TMOD0)
Mode register (TM0)
Modulo register (MODH, MODL)
Mode register (TPGM)
Mode register (WM)
Shift register (SIO)
Mode register (SIOM)
Processor clock control register (PCC)
System clock control register (SCC)
Interrupt request flag (IRQ
Interrupt enable flag (IE
Priority select register (IPS)
INT0 and INT1 mode registers (IM0, IM1)
Output buffer
Output latch
Input/output mode register (PMGA, PMGB)
Output latch
Display mode register (DSPM)
Digit select register (DIGS)
Dimmer select register (DIMS)
Display data memory
Output buffer
Hardware
Table 8-1 Hardware Statuses after Reset
)
)
Only bit 4 set to 1, other bits set to 0
memory address 0000H to PC
the contents of address 0001H to PC
0000H to RBE and bit 7 to MBE.
Sets the low-order 6 bits of program
Sets bit 6 of program memory address
RESET Input in Standby Mode
Undefined
Undefined
Reset (0)
Clear (0)
Hold*1
1000B
Hold
Hold
Hold
Hold
Hold
Hold
0, 0
FFH
0, 0
Hold
Off
Off
0
0
0
0
0
0
0
0
0
0
0
0
0
0
13-8
and
7-0
.
Only bit 4 set to 1, other bits set to 0
Sets the low-order 6 bits of program
memory address 0000H to PC
the contents of address 0001H to PC
Sets bit 6 of program memory address
0000H to RBE and bit 7 to MBE.
RESET Input upon Power-on
Reset or in Operation
1 or undefined*2
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Reset (0)
Clear (0)
1000B
FFH
0, 0
0, 0
Off
Off
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PD75212A
13-8
and
7-0
.
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